// *****************************************************************************
//      Simple Calendar Widget - Cross-Browser Javascript pop-up calendar.
//
//   Copyright (C) 2005-2006  Anthony Garrett
//
//   This library is free software; you can redistribute it and/or
//   modify it under the terms of the GNU Lesser General Public
//   License as published by the Free Software Foundation; either
//   version 2.1 of the License, or (at your option) any later version.
//
//   This library is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//   Lesser General Public License for more details.
//
//   You should have received a copy of the GNU Lesser General Public
//   License along with this library; if not, it is available at
//   the GNU web site (http://www.gnu.org/) or by writing to the
//   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
//   Boston, MA  02110-1301  USA
//
// *****************************************************************************
//
// Contact:   Sorry, I can't offer support for this but if you find a problem
//            (or just want to tell me how useful you find it), please send
//            me an email at scwfeedback@tarrget.info (Note the two Rs in
//            tarrget).  I will try to fix problems quickly but this is a
//            spare time thing for me.
//
// Credits:   I wrote this from scratch myself but I couldn't have done it
//            without the superb "JavaScript The Definitive Guide" by David
//            Flanagan (Pub. O'Reilly ISBN 0-596-00048-0).  I also recognise
//            a contribution from my experience with PopCalendar 4.1 by
//            Liming(Victor) Weng.
//
// Link back: Please give me credit and link back to my page.  To ensure that
//            search engines give my page a higher ranking you can add the
//            following HTML to any indexed page on your web site:
//
//            <A HREF="http://www.tarrget.info/calendar/scw.htm">
//              Simple Calendar Widget by Anthony Garrett
//            </A>
//
// Features:  Easily customised
//                  (output date format, colours, language, year range and
//                   week start day)
//            Accepts a date as input
//                  (see comments below for formats).
//            Cross-browser code tested against;
//                  Internet Explorer 6.0.28     Mozilla  1.7.1
//                  Opera             7.52+      Firefox  0.9.1+
//                  Konqueror         3.4.0      Flock    0.4.9
//
// How to add the Calendar to your page:
//            This script needs to be defined for your page so, immediately
//            after the BODY tag add the following line;
//
//                  <script type='Text/JavaScript' src='scw.js'></script>
//
// How to use the Calendar once it is defined for your page:
//            Simply choose an event to trigger the calendar (like an onClick
//            or an onMouseOver) and an element to work on (for the calendar
//            to take its initial date from and write its output date to) then
//            write it like this;

//                  <<event>>="scwShow(<<element>>,this);"
//
//            e.g. onClick="scwShow(document.getElementById('myElement'),this);"
//            or   onMouseOver="scwShow(this,this);"
//
//            You can also disable days of the week by adding arguments to the
//            call to scwShow.  The values should be Sunday = 0 through to
//            Saturday = 6.  A call to scwShow with Friday and Monday disabled
//            would look something like this;
//
//                  scwShow(<<element>>,this,5,1);
//
//            Finally you can use the following technique to run a function
//            when the calendar closes:
//
//                  scwNextAction=<<function>>.runsAfterSCW(this,<<arguments>>);
//                  scwShow(<<element>>,this <<,optional arguments above>>);
//
//            Where <<function>> is a function defined on the calling page
//            and <<arguments>> is the list of arguments being passed to that
//            function.
//
// *****************************************************************************
//
// Version   Date        By               Description
// =======   ====        ===============  ===========
//   1.0     2004-08-02  Anthony Garrett  Initial release
//   1.1     2005-10-17  Anthony Garrett  Added requested feature to allow
//                                        a click anywhere on the calling page
//                                        to cancel the calendar.
//                                        Added "How to" paragraphs to
//                                        documentation (above).
//                                        Corrected bug that misread numeric
//                                        seed months as one less than entered.
//   1.2     2005-10-26  Anthony Garrett  Allow start of week to be any day.
//   2.0     2005-11-03  Anthony Garrett  Add an IFRAME behind the calendar to
//                                        deal with IE SELECT boxes.
//                                        Renamed all exposed variables and
//                                        functions but kept showCal as entry
//                                        point for backward compatibility.
//                                        Added classes to all HTML elements
//                                        and moved all style attributes to
//                                        inline stlye sheet in customisation
//                                        section.
//   2.1     2005-11-10  Anthony Garrett  Fixed a bug which causes the calendar
//                                        not to display in Firefox when the
//                                        event trigger element's parent was
//                                        not the data element's parent.
//                                        NOTE: This has forced me to add a
//                                              second interface parameter!
//   2.2     2005-11-17  Anthony Garrett  Added input date validation.
//                                        Added input date highlighting (thanks
//                                        to Brad Allan for that suggestion).
//                                        Added optional strict date processing
//                                        (e.g. making 31-Sep an error instead
//                                        of returning 1-Oct). Improved the
//                                        calendar positioning so that CSS
//                                        positioning using DIVs is handled
//                                        correctly.
//   2.3     2005-11-23  Anthony Garrett  Corrected input validation for US
//                                        and other date formats.  Added
//                                        examples for US date processing.
//   2.4     2005-12-10  Anthony Garrett  Added feature to allow disabling
//                                        of specific days of the week, dates
//                                        and date ranges.  Made it optional
//                                        that clicking on the calendar itself
//                                        causes the pop-up to be hidden.
//                                        Thanks to Felix Joussein for the
//                                        feedback.
//   2.41    2005-12-12  Anthony Garrett  Small fix for "Today" display when
//                                        there are no disabled dates.
//   2.42    2005-12-15  Anthony Garrett  Fixed bug where calendar exceeded end
//                                        of range by one month.
//   2.5     2005-12-23  Anthony Garrett  Implemented optional disabling of
//                                        displayed out of range days which
//                                        can occur at the start of the very
//                                        first month and end of thehow:
//                              Passes only legacy arguments,
//                              not the optional day disabling arguments.
//
//      scwShowMonth        Displays a month on the calendar,
//                              Called when a month is set or changed.
//
//      scwBeginDrag        Controls calendar dragging.
//
//      scwCancel           Called when the calendar background is clicked:
//                              Calls scwStopPropagation and may call scwHide.
//      scwHide             Hides the calendar, called on various events.
//      scwStopPropagation  Stops the propagation of an event.
//
// ****************************************************************************

    function showCal(scwEle,scwSourceEle)    {scwShow(scwEle,scwSourceEle);}
    function scwShow(scwEle,scwSourceEle)
        {scwTriggerEle = scwSourceEle;

         // Take any parameters that there might be from the third onwards as
         // day numbers to be disabled 0 = Sunday through to 6 = Saturday.

         scwParmActiveToday = true;

         for (var i=0;i<7;i++)
            {scwPassEnabledDay[(i+7-scwWeekStart)%7] = true;
             for (var j=2;j<arguments.length;j++)
                {if (arguments[j]==i)
                    {scwPassEnabledDay[(i+7-scwWeekStart)%7] = false;
                     if (scwDateNow.getDay()==i) scwParmActiveToday = false;
                    }
                }
            }

         //   If no value is preset then the seed date is
         //      Today (when today is in range) OR
         //      The middle of the date range.

         scwSeedDate = scwDateNow;

         // Strip space characters from start and end of date input
         scwEle.value = scwEle.value.replace(/^\s+/,'').replace(/\s+$/,'');

         // Set the language-dependent elements

         scwSetDefaultLanguage();

         document.getElementById('scwDragText').innerHTML = scwDrag;

         document.getElementById('scwMonths').options.length = 0;
         for (i=0;i<scwArrMonthNames.length;i++)
            document.getElementById('scwMonths').options[i] =
                new Option(scwArrMonthNames[i],scwArrMonthNames[i]);

         document.getElementById('scwYears').options.length = 0;
         for (i=0;i<scwDropDownYears;i++)
            document.getElementById('scwYears').options[i] =
                new Option((scwBaseYear+i),(scwBaseYear+i));

         for (i=0;i<scwArrWeekInits.length;i++)
            document.getElementById('scwWeekInit' + i).innerHTML =
                          scwArrWeekInits[(i+scwWeekStart)%
                                            scwArrWeekInits.length];

         if (document.getElementById('scwFoot'))
            document.getElementById('scwFoot').innerHTML =
                    scwToday + " " +
                    scwDateNow.scwFormat(scwDateDisplayFormat);

         if (scwEle.value.length==0)
            {// If no value is entered and today is within the range,
             // use today's date, otherwise use the middle of the valid range.

             scwBlnFullInputDate=false;

             if ((new Date(scwBaseYear+scwDropDownYears-1,11,31))<scwSeedDate ||
                 (new Date(scwBaseYear,0,1))                     >scwSeedDate
                )
                {scwSeedDate = new Date(scwBaseYear +
                                        Math.floor(scwDropDownYears / 2), 5, 1);
                }
            }
         else
            {function scwInputFormat(scwEleValue)
                {var scwArrSeed = new Array(),
                     scwArrInput = scwEle.value.
                                    split(new RegExp('[\\'+scwArrDelimiters.
                                                        join('\\')+']+','g'));

                 // "Escape" all the user defined date delimiters above -
                 // several delimiters will need it and it does no harm for
                 // the others.

                 // Strip any empty array elements (caused by delimiters)
                 // from the beginning or end of the array. They will
                 // still appear in the output string if in the output
                 // format.

                 if (scwArrInput[0].length==0) scwArrInput.splice(0,1);

                 if (scwArrInput[scwArrInput.length-1].length==0)
                    scwArrInput.splice(scwArrInput.length-1,1);

                 scwBlnFullInputDate = false;

                 switch (scwArrInput.length)
                    {case 1:
                        {// Year only entry
                         scwArrSeed[0] = parseInt(scwArrInput[0],10);   // Year
                         scwArrSeed[1] = '6';                           // Month
                         scwArrSeed[2] = 1;                             // Day
                         break;
                        }
                     case 2:
                        {// Year and Month entry
                         scwArrSeed[0] =
                             parseInt(scwArrInput[scwDateInputSequence.
                                                    replace(/D/i,'').
                                                    search(/Y/i)],10);  // Year
                         scwArrSeed[1] = scwArrInput[scwDateInputSequence.
                                                    replace(/D/i,'').
                                                    search(/M/i)];      // Month
                         scwArrSeed[2] = 1;                             // Day
                         break;
                        }
                     case 3:
                        {// Day Month and Year entry

                         scwArrSeed[0] =
                             parseInt(scwArrInput[scwDateInputSequence.
                                                    search(/Y/i)],10);  // Year
                         scwArrSeed[1] = scwArrInput[scwDateInputSequence.
                                                    search(/M/i)];      // Month
                         scwArrSeed[2] =
                             parseInt(scwArrInput[scwDateInputSequence.
                                                    search(/D/i)],10);  // Day

                         scwBlnFullInputDate = true;
                         break;
                        }
                     default:
                        {// A stuff-up has led to more than three elements in
                         // the date.
                         scwArrSeed[0] = 0;     // Year
                         scwArrSeed[1] = 0;     // Month
                         scwArrSeed[2] = 0;     // Day
                        }
                    }

                 // These regular expressions validate the input date format
                 // to the following rules;
                 //         Day   1-31 (optional zero on single digits)
                 //         Month 1-12 (optional zero on single digits)
                 //                     or case insensitive name
                 //         Year  One, Two or four digits

                 // Months names are as set in the language-dependent
                 // definitions and delimiters are set just below there

                 var scwExpValDay    = /^(0?[1-9]|[1-2]\d|3[0-1])$/,
                     scwExpValMonth  = new RegExp("^(0?[1-9]|1[0-2]|"        +
                                                  scwArrMonthNames.join("|") +
                                                  ")$","i"),
                     scwExpValYear   = /^(\d{1,2}|\d{4})$/;

                 // Apply validation and report failures

                 if (scwExpValYear.exec(scwArrSeed[0])  == null ||
                     scwExpValMonth.exec(scwArrSeed[1]) == null ||
                     scwExpValDay.exec(scwArrSeed[2])   == null
                    )
                    {if (scwShowInvalidDateMsg)
                        alert(scwInvalidDateMsg  +
                               scwInvalidAlert[0] + scwEleValue +
                               scwInvalidAlert[1]);
                     scwBlnFullInputDate = false;
                     scwArrSeed[0] = scwBaseYear +
                                     Math.floor(scwDropDownYears/2); // Year
                     scwArrSeed[1] = '6';                            // Month
                     scwArrSeed[2] = 1;                              // Day
                    }

                 // Return the  Year    in scwArrSeed[0]
                 //             Month   in scwArrSeed[1]
                 //             Day     in scwArrSeed[2]

                 return scwArrSeed;
                }

             // Parse the string into an array using the allowed delimiters

             scwArrSeedDate = scwInputFormat(scwEle.value);

             // So now we have the Year, Month and Day in an array.

             //   If the year is one or two digits then the routine assumes a
             //   year belongs in the 21st Century unless it is less than 50
             //   in which case it assumes the 20th Century is intended.

             if (scwArrSeedDate[0]<100)
                scwArrSeedDate[0] += (scwArrSeedDate[0]>50)?1900:2000;

             // Check whether the month is in digits or an abbreviation

             if (scwArrSeedDate[1].search(/\d+/)!=0)
                {month = scwArrMonthNames.join('|').toUpperCase().
                            search(scwArrSeedDate[1].substr(0,3).
                                                    toUpperCase());
                 scwArrSeedDate[1] = Math.floor(month/4)+1;
                }

             scwSeedDate = new Date(scwArrSeedDate[0],
                                    scwArrSeedDate[1]-1,
                                    scwArrSeedDate[2]);
            }

         // Test that we have arrived at a valid date

         if (isNaN(scwSeedDate))
            {if (scwShowInvalidDateMsg)
                alert(  scwInvalidDateMsg +
                        scwInvalidAlert[0] + scwEle.value +
                        scwInvalidAlert[1]);
             scwSeedDate = new Date(scwBaseYear +
                    Math.floor(scwDropDownYears/2),5,1);
             scwBlnFullInputDate=false;
            }
         else
            {// Test that the date is within range,
             // if not then set date to a sensible date in range.

             if ((new Date(scwBaseYear,0,1)) > scwSeedDate)
                {if (scwBlnStrict && scwShowOutOfRangeMsg)
                    alert(scwOutOfRangeMsg);
                 scwSeedDate = new Date(scwBaseYear,0,1);
                 scwBlnFullInputDate=false;
                }
             else
                {if ((new Date(scwBaseYear+scwDropDownYears-1,11,31))<
                      scwSeedDate)
                    {if (scwBlnStrict && scwShowOutOfRangeMsg)
                        alert(scwOutOfRangeMsg);
                     scwSeedDate = new Date(scwBaseYear +
                                            Math.floor(scwDropDownYears)-1,
                                                       11,1);
                     scwBlnFullInputDate=false;
                    }
                 else
                    {if (scwBlnStrict && scwBlnFullInputDate &&
                          (scwSeedDate.getDate()      != scwArrSeedDate[2] ||
                           (scwSeedDate.getMonth()+1) != scwArrSeedDate[1] ||
                           scwSeedDate.getFullYear()  != scwArrSeedDate[0]
                          )
                        )
                        {if (scwShowDoesNotExistMsg) alert(scwDoesNotExistMsg);
                         scwSeedDate = new Date(scwSeedDate.getFullYear(),
                                                scwSeedDate.getMonth()-1,1);
                         scwBlnFullInputDate=false;
                        }
                    }
                }
            }

         // Test the disabled dates for validity
         // Give error message if not valid.

         for (var i=0;i<scwDisabledDates.length;i++)
            {if (!((typeof scwDisabledDates[i]      == 'object') &&
                   (scwDisabledDates[i].constructor == Date)))
                {if ((typeof scwDisabledDates[i]      == 'object') &&
                     (scwDisabledDates[i].constructor == Array))
                    {var scwPass = true;

                     if (scwDisabledDates[i].length !=2)
                        {if (scwShowRangeDisablingError)
                            alert(  scwRangeDisablingError[0] +
                                    scwDisabledDates[i] +
                                    scwRangeDisablingError[1]);
                         scwPass = false;
                        }
                     else
                        {for (var j=0;j<scwDisabledDates[i].length;j++)
                            {if (!((typeof scwDisabledDates[i][j]
                                    == 'object') &&
                                   (scwDisabledDates[i][j].constructor
                                    == Date)))
                                {if (scwShowRangeDisablingError)
                                    alert(  scwDateDisablingError[0] +
                                            scwDisabledDates[i][j] +
                                            scwDateDisablingError[1]);
                                 scwPass = false;
                                }
                            }
                        }

                     if (scwPass &&
                         (scwDisabledDates[i][0] > scwDisabledDates[i][1])
                        )
                        {scwDisabledDates[i].reverse();}
                    }
                 else
                    {if (scwShowRangeDisablingError)
                        alert(  scwDateDisablingError[0] +
                                scwDisabledDates[i] +
                                scwDateDisablingError[1]);
                    }
                }
            }

         // Calculate the number of months that the entered (or
         // defaulted) month is after the start of the allowed
         // date range.

         scwMonthSum =  12*(scwSeedDate.getFullYear()-scwBaseYear)+
                            scwSeedDate.getMonth();

         // Set the drop down boxes.

         document.getElementById('scwYears').options.selectedIndex =
            Math.floor(scwMonthSum/12);
         document.getElementById('scwMonths').options.selectedIndex=
            (scwMonthSum%12);

         // Position the calendar box

         var offsetTop =parseInt(scwEle.offsetTop ,10) +
                        parseInt(scwEle.offsetHeight,10),
             offsetLeft=parseInt(scwEle.offsetLeft,10);

         scwTargetEle=scwEle;

         do {scwEle=scwEle.offsetParent;
             offsetTop +=parseInt(scwEle.offsetTop,10);
             offsetLeft+=parseInt(scwEle.offsetLeft,10);
            }
         while (scwEle.tagName!='BODY' && scwEle.tagName!='HTML');

         document.getElementById('scw').style.top =offsetTop +'px';
         document.getElementById('scw').style.left=offsetLeft+'px';

         if (document.getElementById('scwIframe'))
            {document.getElementById('scwIframe').style.top=offsetTop +'px';
             document.getElementById('scwIframe').style.left=offsetLeft+'px';
             document.getElementById('scwIframe').style.width=
                (document.getElementById('scw').offsetWidth-2)+'px';
             document.getElementById('scwIframe').style.height=
                (document.getElementById('scw').offsetHeight-2)+'px';
             document.getElementById('scwIframe').style.visibility='visible';
            }

         // Check whether or not dragging is allowed and display drag handle
         // if necessary

         document.getElementById('scwDrag').style.display=
             (scwAllowDrag)
                ?((document.getElementById('scwIFrame')||
                   document.getElementById('scwIEgte7'))?'block':'table-row')
                :'none';

         // Display the month

         scwShowMonth(0);

         // Show it on the page

         document.getElementById('scw').style.visibility='visible';

         if (typeof event=='undefined')
                {scwSourceEle.parentNode.
                        addEventListener("click",scwStopPropagation,false);
                }
         else   {event.cancelBubble = true;}
        }

    function scwHide()
        {document.getElementById('scw').style.visibility='hidden';
         if (document.getElementById('scwIframe'))
            {document.getElementById('scwIframe').style.visibility='hidden';}

         if (typeof scwNextAction!='undefined' && scwNextAction!=null)
             {scwNextActionReturn = scwNextAction();
              // Explicit null set to prevent closure causing memory leak
              scwNextAction = null;
             }
        }

    function scwCancel(scwEvt)
        {if (scwClickToHide) scwHide();
         scwStopPropagation(scwEvt);
        }

    function scwStopPropagation(scwEvt)
        {if (scwEvt.stopPropagation)
                scwEvt.stopPropagation();    // Capture phase
         else   scwEvt.cancelBubble = true;  // Bubbling phase
        }

    function scwBeginDrag(event)
        {var elementToDrag = document.getElementById('scw');

         var deltaX    = event.clientX,
             deltaY    = event.clientY,
             offsetEle = elementToDrag;

         do {deltaX   -= parseInt(offsetEle.offsetLeft,10);
             deltaY   -= parseInt(offsetEle.offsetTop ,10);
             offsetEle = offsetEle.offsetParent;
            }
         while (offsetEle.tagName!='BODY' &&
                offsetEle.tagName!='HTML');

         if (document.addEventListener)
                {document.addEventListener('mousemove',
                                           moveHandler,
                                           true);        // Capture phase
                 document.addEventListener('mouseup',
                                           upHandler,
                                           true);        // Capture phase
                }
         else   {elementToDrag.attachEvent('onmousemove',
                                           moveHandler); // Bubbling phase
                 elementToDrag.attachEvent('onmouseup',
                                             upHandler); // Bubbling phase
                 elementToDrag.setCapture();
                }

         scwStopPropagation(event);

         function moveHandler(scwEvt)
            {if (!scwEvt) scwEvt = window.event;

             elementToDrag.style.left = (scwEvt.clientX - deltaX) + 'px';
             elementToDrag.style.top  = (scwEvt.clientY - deltaY) + 'px';

             if (document.getElementById('scwIframe'))
                {document.getElementById('scwIframe').style.left =
                    (scwEvt.clientX - deltaX) + 'px';
                 document.getElementById('scwIframe').style.top  =
                    (scwEvt.clientY - deltaY) + 'px';
                }

             scwStopPropagation(scwEvt);
            }

         function upHandler(scwEvt)
            {if (!scwEvt) scwEvt = window.event;

             if (document.removeEventListener)
                    {document.removeEventListener('mousemove',
                                                  moveHandler,
                                                  true);     // Capture phase
                     document.removeEventListener('mouseup',
                                                  upHandler,
                                                  true);     // Capture phase
                    }
             else   {elementToDrag.detachEvent('onmouseup',
                                                 upHandler); // Bubbling phase
                     elementToDrag.detachEvent('onmousemove',
                                               moveHandler); // Bubbling phase
                     elementToDrag.releaseCapture();
                    }

             scwStopPropagation(scwEvt);
            }
        }

    function scwShowMonth(scwBias)
        {// Set the selectable Month and Year
         // May be called: from the left and right arrows
         //                  (shift month -1 and +1 respectively)
         //                from the month selection list
         //                from the year selection list
         //                from the showCal routine
         //                  (which initiates the display).

         var scwShowDate  = new Date(Date.parse(new Date().toDateString())),
             scwStartDate = new Date();

         scwSelYears  = document.getElementById('scwYears');
         scwSelMonths = document.getElementById('scwMonths');

         if (scwSelYears.options.selectedIndex>-1)
            {scwMonthSum=12*(scwSelYears.options.selectedIndex)+scwBias;
             if (scwSelMonths.options.selectedIndex>-1)
                {scwMonthSum+=scwSelMonths.options.selectedIndex;}
            }
         else
            {if (scwSelMonths.options.selectedIndex>-1)
                {scwMonthSum+=scwSelMonths.options.selectedIndex;}
            }

         scwShowDate.setFullYear(scwBaseYear + Math.floor(scwMonthSum/12),
                                 (scwMonthSum%12),
                                 1);

         // If the Week numbers are displayed, shift the week day names
         // to the right.
         document.getElementById("scwWeek_").style.display=
             (scwWeekNumberDisplay)
                ?((document.getElementById('scwIFrame')||
                   document.getElementById('scwIEgte7'))?'block':'table-cell')
                :'none';

         if ((12*parseInt((scwShowDate.getFullYear()-scwBaseYear),10)) +
             parseInt(scwShowDate.getMonth(),10) < (12*scwDropDownYears)  &&
             (12*parseInt((scwShowDate.getFullYear()-scwBaseYear),10)) +
             parseInt(scwShowDate.getMonth(),10) > -1)
            {scwSelYears.options.selectedIndex=Math.floor(scwMonthSum/12);
             scwSelMonths.options.selectedIndex=(scwMonthSum%12);

             scwCurMonth = scwShowDate.getMonth();

             scwShowDate.setDate((((scwShowDate.
                                    getDay()-scwWeekStart)<0)?-6:1)+
                                 scwWeekStart-scwShowDate.getDay());

             scwStartDate = new Date(scwShowDate);

             var scwFoot = document.getElementById('scwFoot');

             function scwFootOutput() {scwSetOutput(scwDateNow);}

             if (scwDisabledDates.length==0)
                {if (scwActiveToday && scwParmActiveToday)
                    {scwFoot.onclick     = scwFootOutput;
                     scwFoot.className   = 'scwFoot';

                     if (document.getElementById('scwIFrame'))
                        {scwFoot.onmouseover  = scwChangeClass;
                         scwFoot.onmouseout   = scwChangeClass;
                        }

                    }
                 else
                    {scwFoot.onclick     = null;
                     scwFoot.className   = 'scwFootDisabled';

                     if (document.getElementById('scwIFrame'))
                        {scwFoot.onmouseover  = null;
                         scwFoot.onmouseout   = null;
                        }

                     if (document.addEventListener)
                            {scwFoot.addEventListener('click',
                                                      scwStopPropagation,
                                                      false);}
                     else   {scwFoot.attachEvent('onclick',
                                                 scwStopPropagation);}
                    }
                }
             else
                {for (var k=0;k<scwDisabledDates.length;k++)
                    {if (!scwActiveToday || !scwParmActiveToday ||
                         ((typeof scwDisabledDates[k] == 'object')            &&
                             (((scwDisabledDates[k].constructor == Date)      &&
                               scwDateNow.valueOf() == scwDisabledDates[k].
                                                            valueOf()
                              ) ||
                              ((scwDisabledDates[k].constructor == Array)     &&
                               scwDateNow.valueOf() >= scwDisabledDates[k][0].
                                                        valueOf()             &&
                               scwDateNow.valueOf() <= scwDisabledDates[k][1].
                                                        valueOf()
                              )
                             )
                         )
                        )
                        {scwFoot.onclick     = null;
                         scwFoot.className   = 'scwFootDisabled';

                         if (document.getElementById('scwIFrame'))
                            {scwFoot.onmouseover  = null;
                             scwFoot.onmouseout   = null;
                            }

                         if (document.addEventListener)
                                {scwFoot.addEventListener('click',
                                                          scwStopPropagation,
                                                          false);
                                }
                         else   {scwFoot.attachEvent('onclick',
                                                     scwStopPropagation);
                                }
                         break;
                        }
                     else
                        {scwFoot.onclick=scwFootOutput;
                         scwFoot.className='scwFoot';

                         if (document.getElementById('scwIFrame'))
                            {scwFoot.onmouseover  = scwChangeClass;
                             scwFoot.onmouseout   = scwChangeClass;
                            }
                        }
                    }
                }

             function scwSetOutput(scwOutputDate)
                {scwTargetEle.value =
                    scwOutputDate.scwFormat(scwDateOutputFormat);
                 scwHide();
                }

             function scwCellOutput(scwEvt)
                {var scwEle = scwEventTrigger(scwEvt),
                     scwOutputDate = new Date(scwStartDate);

                 if (scwEle.nodeType==3) scwEle=scwEle.parentNode;

                 scwOutputDate.setDate(scwStartDate.getDate() +
                                         parseInt(scwEle.id.substr(8),10));

                 scwSetOutput(scwOutputDate);
                }

             function scwChangeClass(scwEvt)
                {var scwEle = scwEventTrigger(scwEvt);

                 if (scwEle.nodeType==3) scwEle=scwEle.parentNode;

                 switch (scwEle.className)
                    {case 'scwCells':
                        scwEle.className = 'scwCellsHover';
                        break;
                     case 'scwCellsHover':
                        scwEle.className = 'scwCells';
                        break;
                     case 'scwCellsExMonth':
                        scwEle.className = 'scwCellsExMonthHover';
                        break;
                     case 'scwCellsExMonthHover':
                        scwEle.className = 'scwCellsExMonth';
                        break;
                     case 'scwCellsWeekend':
                        scwEle.className = 'scwCellsWeekendHover';
                        break;
                     case 'scwCellsWeekendHover':
                        scwEle.className = 'scwCellsWeekend';
                        break;
                     case 'scwFoot':
                        scwEle.className = 'scwFootHover';
                        break;
                     case 'scwFootHover':
                        scwEle.className = 'scwFoot';
                        break;
                     case 'scwInputDate':
                        scwEle.className = 'scwInputDateHover';
                        break;
                     case 'scwInputDateHover':
                        scwEle.className = 'scwInputDate';
                    }

                 return true;
                }

             function scwEventTrigger(scwEvt)
                {if (!scwEvt) scwEvt = event;
                 return scwEvt.target||scwEvt.srcElement;
                }

            function scwWeekNumber(scwInDate)
                {// The base day in the week of the input date
                 var scwInDateWeekBase = new Date(scwInDate);

                 scwInDateWeekBase.setDate(scwInDateWeekBase.getDate()
                                            - scwInDateWeekBase.getDay()
                                            + scwWeekNumberBaseDay
                                            + ((scwInDate.getDay()>
                                                scwWeekNumberBaseDay)?7:0));

                 // The first Base Day in the year
                 var scwFirstBaseDay =
                        new Date(scwInDateWeekBase.getFullYear(),0,1)

                 scwFirstBaseDay.setDate(scwFirstBaseDay.getDate()
                                            - scwFirstBaseDay.getDay()
                                            + scwWeekNumberBaseDay
                                        );

                 if (scwFirstBaseDay <
                        new Date(scwInDateWeekBase.getFullYear(),0,1))
                    {scwFirstBaseDay.setDate(scwFirstBaseDay.getDate()+7);}

                 // Start of Week 01
                 var scwStartWeekOne = new Date(scwFirstBaseDay
                                                - scwWeekNumberBaseDay
                                                + scwInDate.getDay());

                 if (scwStartWeekOne > scwFirstBaseDay)
                    {scwStartWeekOne.setDate(scwStartWeekOne.getDate()-7);}

                 // Subtract the date of the current week from the date of the
                 // first week of the year to get the number of weeks in
                 // milliseconds.  Divide by the number of milliseconds
                 // in a week then round to no decimals in order to remove
                 // the effect of daylight saving.  Add one to make the first
                 // week, week 1.  Place a string zero on the front so that
                 // week numbers are zero filled.

                 var scwWeekNo =
                     "0" + (Math.round((scwInDateWeekBase -
                                        scwFirstBaseDay)/604800000,0) + 1);

                 // Return the last two characters in the week number string

                 return scwWeekNo.substring(scwWeekNo.length-2,
                                            scwWeekNo.length);
                }

             // Treewalk to display the dates.
             // I tried to use getElementsByName but IE refused to cooperate
             // so I resorted to this method which works for all tested
             // browsers.

             var scwCells = document.getElementById('scwCells');

             for (i=0;i<scwCells.childNodes.length;i++)
                {var scwRows = scwCells.childNodes[i];
                 if (scwRows.nodeType==1 && scwRows.tagName=='TR')
                    {if (scwWeekNumberDisplay)
                        {//Calculate the week number using scwShowDate
                         scwRows.childNodes[0].innerHTML =
                             scwWeekNumber(scwShowDate);
                         scwRows.childNodes[0].style.display=
                            (document.getElementById('scwIFrame')||
                             document.getElementById('scwIEgte7'))
                                ?'block'
                                :'table-cell';
                        }
                     else
                        {scwRows.childNodes[0].style.display='none';}

                     for (j=1;j<scwRows.childNodes.length;j++)
                        {var scwCols = scwRows.childNodes[j];
                         if (scwCols.nodeType==1 && scwCols.tagName=='TD')
                            {scwRows.childNodes[j].innerHTML=
                                scwShowDate.getDate();
                             var scwCell=scwRows.childNodes[j],
                                 scwDisabled =
                                    (scwOutOfRangeDisable &&
                                     (scwShowDate < (new Date(scwBaseYear,0,1))
                                      ||
                                      scwShowDate > (new Date(scwBaseYear+
                                                              scwDropDownYears-
                                                              1,11,31))
                                     )
                                    )?true:false;

                             for (var k=0;k<scwDisabledDates.length;k++)
                                {if ((typeof scwDisabledDates[k]=='object')
                                     &&
                                     (scwDisabledDates[k].constructor ==
                                      Date
                                     )
                                     &&
                                     scwShowDate.valueOf() ==
                                        scwDisabledDates[k].valueOf()
                                    )
                                    {scwDisabled = true;}
                                 else
                                    {if ((typeof scwDisabledDates[k]=='object')
                                         &&
                                         (scwDisabledDates[k].constructor ==
                                          Array
                                         )
                                         &&
                                         scwShowDate.valueOf() >=
                                             scwDisabledDates[k][0].valueOf()
                                         &&
                                         scwShowDate.valueOf() <=
                                             scwDisabledDates[k][1].valueOf()
                                        )
                                        {scwDisabled = true;}
                                    }
                                }

                             if (scwDisabled ||
                                 !scwEnabledDay[j-1+(7*((i*scwCells.
                                                          childNodes.
                                                          length)/6))] ||
                                 !scwPassEnabledDay[(j-1+(7*(i*scwCells.
                                                               childNodes.
                                                               length/6)))%7]
                                )
                                {scwRows.childNodes[j].onclick     = null;

                                 if (document.getElementById('scwIFrame'))
                                    {scwRows.childNodes[j].onmouseover  = null;
                                     scwRows.childNodes[j].onmouseout   = null;
                                    }

                                 scwCell.className=
                                    (scwShowDate.getMonth()!=scwCurMonth)
                                        ?'scwCellsExMonthDisabled'
                                        :(scwBlnFullInputDate &&
                                          scwShowDate.toDateString()==
                                          scwSeedDate.toDateString())
                                            ?'scwInputDateDisabled'
                                            :(scwShowDate.getDay()%6==0)
                                                ?'scwCellsWeekendDisabled'
                                                :'scwCellsDisabled';
                                }
                             else
                                {scwRows.childNodes[j].onclick=scwCellOutput;

                                 if (document.getElementById('scwIFrame'))
                                    {scwRows.childNodes[j].onmouseover  =
                                        scwChangeClass;
                                     scwRows.childNodes[j].onmouseout   =
                                        scwChangeClass;
                                    }

                                 scwCell.className=
                                     (scwShowDate.getMonth()!=scwCurMonth)
                                        ?'scwCellsExMonth'
                                        :(scwBlnFullInputDate &&
                                          scwShowDate.toDateString()==
                                          scwSeedDate.toDateString())
                                            ?'scwInputDate'
                                            :(scwShowDate.getDay()%6==0)
                                                ?'scwCellsWeekend'
                                                :'scwCells';

                               }

                             scwShowDate.setDate(scwShowDate.getDate()+1);
                            }
                        }
                    }
                }
            }
         // Force a re-draw to prevent Opera's poor dynamic rendering
         // from leaving garbage in the calendar when the displayed
         // month is changed.
         document.getElementById('scw').style.visibility='hidden';
         document.getElementById('scw').style.visibility='visible';
        }

// *************************
//  End of Function Library
// *************************
// ***************************
// Start of Calendar structure
// ***************************

    document.write(
     "<!--[if gte IE 7]>" +
        "<div id='scwIEgte7'></div>" +
     "<![endif]-->" +
     "<!--[if lt  IE 7]>" +
        "<iframe class='scw' src='scwblank.html' " +
                "id='scwIframe' name='scwIframe' " +
                "frameborder='0'>" +
        "</iframe>" +
     "<![endif]-->" +
     "<table id='scw' class='scw' onclick='scwCancel(event);'>" +
       "<tr class='scw'>" +
         "<td class='scw'>" +
           "<table class='scwHead' id='scwHead' width='100%' " +
                    "onClick='scwStopPropagation(event);' " +
                    "cellspacing='0' cellpadding='0'>" +
            "<tr id='scwDrag' style='display:none;'>" +
                "<td colspan='4' class='scwDrag' " +
                    "onmousedown='scwBeginDrag(event);'>" +
                    "<div id='scwDragText'></div>" +
                "</td>" +
            "</tr>" +
            "<tr class='scwHead'>" +
                 "<td class='scwHead'>" +
                    "<input class='scwHead' type='button' value='<' " +
                            "onclick='scwShowMonth(-1);'  /></td>" +
                 "<td class='scwHead'>" +
                    "<select id='scwMonths' class='scwHead' " +
                            "onChange='scwShowMonth(0);'>" +
                    "</select>" +
                 "</td>" +
                 "<td class='scwHead'>" +
                    "<select id='scwYears' class='scwHead' " +
                            "onChange='scwShowMonth(0);'>" +
                    "</select>" +
                 "</td>" +
                 "<td class='scwHead'>" +
                    "<input class='scwHead' type='button' value='>' " +
                            "onclick='scwShowMonth(1);' /></td>" +
                "</tr>" +
              "</table>" +
            "</td>" +
          "</tr>" +
          "<tr class='scw'>" +
            "<td class='scw'>" +
              "<table class='scwCells' align='center'>" +
                "<thead>" +
                  "<tr><td class='scwWeekNumberHead' id='scwWeek_' ></td>");

    for (i=0;i<7;i++)
        document.write( "<td class='scwWeek' id='scwWeekInit" + i + "'></td>");

    document.write("</tr>" +
                "</thead>" +
                "<tbody id='scwCells' " +
                        "onClick='scwStopPropagation(event);'>");

    for (i=0;i<6;i++)
        {document.write(
                    "<tr>" +
                      "<td class='scwWeekNo' id='scwWeek_" + i + "'></td>");
         for (j=0;j<7;j++)
            {document.write(
                        "<td class='scwCells' id='scwCell_" + (j+(i*7)) +
                        "'></td>");
            }

         document.write(
                    "</tr>");
        }

    document.write(
                "</tbody>");

    if ((new Date(scwBaseYear + scwDropDownYears, 11, 32)) > scwDateNow &&
        (new Date(scwBaseYear, 0, 0))                      < scwDateNow)
        {document.write(
                  "<tfoot class='scwFoot'>" +
                    "<tr class='scwFoot'>" +
                      "<td class='scwFoot' id='scwFoot' colspan='8'>" +
                      "</td>" +
                    "</tr>" +
                  "</tfoot>");
        }

    document.write(
              "</table>" +
            "</td>" +
          "</tr>" +
        "</table>");

// ***************************
//  End of Calendar structure
// ***************************
// ****************************************
// Start of document level event definition
// ****************************************

    if (document.addEventListener)
            {document.addEventListener('click',scwHide, false);}
    else    {document.attachEvent('onclick',scwHide);}

// ****************************************
//  End of document level event definition
// ****************************************
// ************************************
//  End of Simple Calendar Widget Code
// ************************************