// how reliable is this test?
         isIE = (document.all ? true : false);
	 isDOM = (document.getElementById ? true : false);

         // Initialize arrays.
         var months = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
	 "Aug", "Sep", "Oct", "Nov", "Dec");
         var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31,
            30, 31, 30, 31);
	 var displayMonth = new Date().getMonth();
	 var displayYear = new Date().getFullYear();
	 var displayDivName;
	 var displayElement;
	 var dateFormat = "DDMMYYYY";
	 var selectedYear;
  	 var selectedMonth;
  	 var selectedDay;

         function getDays(month, year) {
            // Test for leap year when February is selected.
            if (1 == month)
               return ((0 == year % 4) && (0 != (year % 100))) ||
                  (0 == year % 400) ? 29 : 28;
            else
               return daysInMonth[month];
         }

         function getToday() {
            // Generate today's date.
            this.now = new Date();
            this.year = this.now.getFullYear();
            this.month = this.now.getMonth();
            this.day = this.now.getDate();
         }

         // Start with a calendar for today.
         today = new getToday();

         function newCalendar(eltName,attachedElement) {
	    if (attachedElement) {
	       if (displayDivName && displayDivName != eltName) hideElement(displayDivName);
	       displayElement = attachedElement;
	    }
	    displayDivName = eltName;
            today = new getToday();
            var parseYear = parseInt(displayYear + '');
            var newCal = new Date(parseYear,displayMonth,1);
            var day = -1;
            var startDayOfWeek = newCal.getDay();
            if ((today.year == newCal.getFullYear()) &&
                  (today.month == newCal.getMonth()))
	    {
               day = today.day;
            }
            var intDaysInMonth =
               getDays(newCal.getMonth(), newCal.getFullYear());
            var daysGrid = makeDaysGrid(startDayOfWeek,day,intDaysInMonth,newCal,eltName)
	    if (isIE) {
	       var elt = document.all[eltName];
	       elt.innerHTML = daysGrid;
            } else if (isDOM) {
	       var elt = document.getElementById(eltName);
	       elt.innerHTML = daysGrid;
	    } else {
	       var elt = document.layers[eltName].document;
	       elt.open();
	       elt.write(daysGrid);
	       elt.close();
	    }
	 }

	 function incMonth(delta,eltName) {
	   displayMonth += delta;
	   if (displayMonth >= 12) {
	     displayMonth = 0;
	     incYear(1,eltName);
	   } else if (displayMonth <= -1) {
	     displayMonth = 11;
	     incYear(-1,eltName);
	   } else {
	     newCalendar(eltName);
	   }
	 }

	 function incYear(delta,eltName) {
	   displayYear = parseInt(displayYear + '') + delta;
	   newCalendar(eltName);
	 }

/*	 function makeDaysGrid(startDay,day,intDaysInMonth,newCal,eltName) {
	    var daysGrid;
	    var month = newCal.getMonth();
	    var year = newCal.getFullYear();
	    var isThisYear = (year == new Date().getFullYear());
	    var isThisMonth = (day > -1)
	    daysGrid = '<table border=1 cellspacing=0 cellpadding=2><tr><td bgcolor=#ffffff nowrap>';
	    daysGrid += '<font face="courier new, courier" size=2>';
	    daysGrid += '<a href="javascript:hideElement(\'' + eltName + '\')">x</a>';
	    daysGrid += '&nbsp;&nbsp;';
	    daysGrid += '<a href="javascript:incMonth(-1,\'' + eltName + '\')">&laquo; </a>';

	    daysGrid += '<b>';
	    if (isThisMonth) { daysGrid += '<font color=red>' + months[month] + '</font>'; }
	    else { daysGrid += months[month]; }
	    daysGrid += '</b>';

	    daysGrid += '<a href="javascript:incMonth(1,\'' + eltName + '\')"> &raquo;</a>';
	    daysGrid += '&nbsp;&nbsp;&nbsp;';
	    daysGrid += '<a href="javascript:incYear(-1,\'' + eltName + '\')">&laquo; </a>';

	    daysGrid += '<b>';
	    if (isThisYear) { daysGrid += '<font color=red>' + year + '</font>'; }
	    else { daysGrid += ''+year; }
	    daysGrid += '</b>';

	    daysGrid += '<a href="javascript:incYear(1,\'' + eltName + '\')"> &raquo;</a><br>';
	    daysGrid += '&nbsp;Su Mo Tu We Th Fr Sa&nbsp;<br>&nbsp;';
	    var dayOfMonthOfFirstSunday = (7 - startDay + 1);
	    for (var intWeek = 0; intWeek < 6; intWeek++) {
	       var dayOfMonth;
	       for (var intDay = 0; intDay < 7; intDay++) {
	         dayOfMonth = (intWeek * 7) + intDay + dayOfMonthOfFirstSunday - 7;
		 if (dayOfMonth <= 0) {
	           daysGrid += "&nbsp;&nbsp; ";
		 } else if (dayOfMonth <= intDaysInMonth) {
		   var color = "blue";
		   if (day > 0 && day == dayOfMonth) color="red";
		   daysGrid += '<a href="javascript:setDay(';
		   daysGrid += dayOfMonth + ',\'' + eltName + '\',\''+ dateFormat+'\')" '
		   daysGrid += 'style="color:' + color + '">';
		   var dayString = dayOfMonth + "</a> ";
		   if (dayString.length == 6) dayString = '0' + dayString;
		   daysGrid += dayString;
		 }
	       }
	       if (dayOfMonth < intDaysInMonth) daysGrid += "<br>&nbsp;";
	    }
	    return daysGrid + "</td></tr></table>";
	 }*/

	 function makeDaysGrid(startDay,day,intDaysInMonth,newCal,eltName) {
	    var daysGrid;
	    var month = newCal.getMonth();
	    var year = newCal.getFullYear();
	    var isThisYear = (year == new Date().getFullYear());
	    var isThisMonth = (day > -1);
		daysGrid = '\n' + '<table width="200" border="0" cellpadding="1" cellspacing="0" class="calTable">' + '\n';
		daysGrid += '<tr>' + '\n';
		daysGrid += '<td width="26" align="center" valign="middle" class="move" onMouseDown="dragStart(event, \'' + eltName + '\')">&nbsp;</td>' + '\n'; // dragable
		daysGrid += '<td colspan="5" align="center" valign="middle" class="chooseDate">Choose a Date</td>' + '\n'; // display year & month
		daysGrid += '<td width="26" align="center" valign="middle" class="close" onclick="hideElement(\'' + eltName + '\')">x</td>' + '\n'; // close		
		daysGrid += '</tr>' + '\n';
		daysGrid += '<tr>' + '\n';
		daysGrid += '<td align="center" valign="middle" class="pre_yrs" onclick="incYear(-1,\'' + eltName + '\')">&lt;&lt;</td>' + '\n'; // previous year
		daysGrid += '<td width="26" align="center" valign="middle" class="pre_mth" onclick="incMonth(-1,\'' + eltName + '\')">&lt;</td>' + '\n'; // previous month		
		daysGrid += '<td colspan="3" align="center" valign="middle" class="mth_yrs"><b>' + months[month] + ', ' + year + '</b></td>' + '\n'; // display year & month
		daysGrid += '<td width="26" align="center" valign="middle" class="next_mth" onclick="incMonth(1,\'' + eltName + '\')">&gt;</td>' + '\n'; // next month
		daysGrid += '<td align="center" valign="middle" class="next_yrs" onclick="incYear(1,\'' + eltName + '\')">&gt;&gt;</td>' + '\n'; // next year
		daysGrid += '</tr>' + '\n';
		daysGrid += '<tr>' + '\n';
		daysGrid += '<td align="center" valign="middle" class="weekendtitle">Sun</td>' + '\n';
		daysGrid += '<td align="center" valign="middle" class="weekdaytitle">Mon</td>' + '\n';
		daysGrid += '<td width="26" align="center" valign="middle" class="weekdaytitle">Tue</td>' + '\n';
		daysGrid += '<td width="26" align="center" valign="middle" class="weekdaytitle">Wed</td>' + '\n';
		daysGrid += '<td width="26" align="center" valign="middle" class="weekdaytitle">Thu</td>' + '\n';
		daysGrid += '<td align="center" valign="middle" class="weekdaytitle">Fri</td>' + '\n';
		daysGrid += '<td align="center" valign="middle" class="weekendtitle">Sat</td>' + '\n';
		daysGrid += '</tr>';
		// start generate day
		var dayOfMonthOfFirstSunday = (7 - startDay + 1);
		for (var intWeek = 0; intWeek < 6; intWeek++) {
	       var dayOfMonth;
		   daysGrid += '<tr>';
	       for (var intDay = 0; intDay < 7; intDay++) {
	         dayOfMonth = (intWeek * 7) + intDay + dayOfMonthOfFirstSunday - 7;
				 if (dayOfMonth <= 0) {
	           		daysGrid += '<td align="center" valign="middle" class="empty">&nbsp;</td>'; // empty day
		 		 } else if (dayOfMonth <= intDaysInMonth) {
		   			if (day > 0 && day == dayOfMonth){
						daysGrid += '<td align="center" valign="middle" class="todaydate" onClick="setDay(\'' + dayOfMonth + '\',\'' + eltName + '\',\''+ dateFormat+'\')" ' + '>';
					} else if (selectedMonth==month && selectedYear==year && selectedDay==dayOfMonth) {	
						daysGrid += '<td align="center" valign="middle" class="selecteddate" onClick="setDay(\'' + dayOfMonth + '\',\'' + eltName + '\',\''+ dateFormat+'\')" ' + '>';
					} else {
						if (intDay==0 || intDay==6) {
							daysGrid += '<td align="center" valign="middle" class="weekend" onClick="setDay(\'' + dayOfMonth + '\',\'' + eltName + '\',\''+ dateFormat+'\')" ' + '>';
						} else {
							daysGrid += '<td align="center" valign="middle" class="weekday" onClick="setDay(\'' + dayOfMonth + '\',\'' + eltName + '\',\''+ dateFormat+'\')" ' + '>';
						}
					}
					var dayString = dayOfMonth + "</td> ";				
		   			if (dayString.length == 6) dayString = '0' + dayString;
		   			daysGrid += dayString;
		 		}
	       	}
	       if (dayOfMonth < intDaysInMonth){
			   daysGrid += "</tr>";
		   } 
	    }
		// end generate day
		daysGrid += '</table>';
		return daysGrid;		
	 }

	 function setDay(day,eltName,dateFormat) {
		var displayMonthShow = displayMonth + 1;
		if (day < 10){
			day = "0" + day;
		}
		if (displayMonthShow < 10){
			displayMonthShow = "0" + displayMonthShow;
		}
		if (dateFormat == 'DDMMYYYY'){
			displayElement.value = day + "/" + displayMonthShow + "/" + displayYear;
			hideElement(eltName);
		} else if (dateFormat == 'MMDDYYYY'){
			displayElement.value = displayMonthShow + "/" + day + "/" + displayYear;
			hideElement(eltName);
		}
	 }

function Browser() {

  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var browser = new Browser();

// Global object to hold drag information.

var dragObj = new Object();
dragObj.zIndex = 0;

function dragStart(event, id) {

  var el;
  var x, y;

  // If an element id was given, find it. Otherwise use the element being
  // clicked on.

  if (id)
    dragObj.elNode = document.getElementById(id);
  else {
    if (browser.isIE)
      dragObj.elNode = window.event.srcElement;
    if (browser.isNS)
      dragObj.elNode = event.target;

    // If this is a text node, use its parent element.

    if (dragObj.elNode.nodeType == 3)
      dragObj.elNode = dragObj.elNode.parentNode;
  }

  // Get cursor position with respect to the page.

  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  // Save starting positions of cursor and element.

  dragObj.cursorStartX = x;
  dragObj.cursorStartY = y;
  dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
  dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);

  if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
  if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;

  // Update element's z-index.

  dragObj.elNode.style.zIndex = ++dragObj.zIndex;

  // Capture mousemove and mouseup events on the page.

  if (browser.isIE) {
    document.attachEvent("onmousemove", dragGo);
    document.attachEvent("onmouseup",   dragStop);
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS) {
    document.addEventListener("mousemove", dragGo,   true);
    document.addEventListener("mouseup",   dragStop, true);
    event.preventDefault();
  }
}

function dragGo(event) {

  var x, y;

  // Get cursor position with respect to the page.

  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  // Move drag element by the same amount the cursor has moved.

  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";

  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
}

function dragStop(event) {

  // Stop capturing mousemove and mouseup events.

  if (browser.isIE) {
    document.detachEvent("onmousemove", dragGo);
    document.detachEvent("onmouseup",   dragStop);
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", dragGo,   true);
    document.removeEventListener("mouseup",   dragStop, true);
  }
}