/*
  *****************************************************************************************************
  Author : Lea Smart
  Source : www.totallysmartit.com
  Date : 7/3/2001
  DHTML Calendar
  Version 1.2
  
  You are free to use this code if you retain this header.
  You do not need to link to my site (be nice though!)
  
  Amendments
  22 Jan 2002; Added ns resize bug code; rewrote date functions into Date 'class';
         Added support for yyyy-mm-dd date format
         Added support for calendar beginning on any day
  7th Feb 2002 Fixed day highlight when year wasn't current year bug
  9th Jun 2002 Fixed bug with weekend colour
         Amended the code for the date functions extensions.  Shortened addDays code considerably
  *****************************************************************************************************
  */
  var timeoutDelay = 2000; // milliseconds, change this if you like, set to 0 for the calendar to never auto disappear
  var g_startDay = 0// 0=sunday, 1=monday
  
  // preload images
  var imgUp = new Image(8,12);
  imgUp.src = '/calendar/up.gif';
  var imgDown = new Image(8,12);
  imgDown.src = '/calendar/down.gif';
  
  // used by timeout auto hide functions
  var timeoutId = false;
  
  // the now standard browser sniffer class
  function Browser(){
    this.dom = document.getElementById?1:0;
    this.ie4 = (document.all && !this.dom)?1:0;
    this.ns4 = (document.layers && !this.dom)?1:0;
    this.ns6 = (this.dom && !document.all)?1:0;
    this.ie5 = (this.dom && document.all)?1:0;
    this.ok = this.dom || this.ie4 || this.ns4;
    this.platform = navigator.platform;
  }
  var browser = new Browser();
    
  // dom browsers require this written to the HEAD section
  
  if (browser.dom || browser.ie4){
    document.writeln('<style>');
    document.writeln('#container {');
    document.writeln('position : absolute;');
    document.writeln('left : 100px;');
    document.writeln('top : 100px;');
    document.writeln('width : 124px;');;
    browser.platform=='Win32'?height=140:height=145;
    document.writeln('height : ' + height +'px;');
    document.writeln('clip:rect(0px 124px ' + height + 'px 0px);');
    //document.writeln('overflow : hidden;');
    document.writeln('visibility : hidden;');
    document.writeln('background-color : #ffffff');
    document.writeln('}');
    document.writeln('</style>')
    document.write('<div id="container"');
    if (timeoutDelay) document.write(' onmouseout="calendarTimeout();" onmouseover="if (timeoutId) clearTimeout(timeoutId);"');
    document.write('></div>');
  }
  
  var g_Calendar;  // global to hold the calendar reference, set by constructor
  
  function calendarTimeout(){
    if (browser.ie4 || browser.ie5){
      if (window.event.srcElement && window.event.srcElement.name!='month') timeoutId=setTimeout('g_Calendar.hide();',timeoutDelay);
    }
    if (browser.ns6 || browser.ns4){
      timeoutId=setTimeout('g_Calendar.hide();',timeoutDelay);
    }
  }
  
  // constructor for calendar class
  function Calendar(){
    g_Calendar = this;
    // some constants needed throughout the program
    this.daysOfWeek = new Array("Su","Mo","Tu","We","Th","Fr","Sa");
    this.months = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
    this.daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
    
    if (browser.ns4){
      var tmpLayer = new Layer(127);
    if (timeoutDelay){
      tmpLayer.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
      tmpLayer.onmouseover = function(event) { if (timeoutId) clearTimeout(timeoutId); };
      tmpLayer.onmouseout = function(event) { timeoutId=setTimeout('g_Calendar.hide()',timeoutDelay);};
    }
      tmpLayer.x = 100;
      tmpLayer.y = 100;
      tmpLayer.bgColor = "#ffffff";
    }
    if (browser.dom || browser.ie4){
    var tmpLayer = browser.dom?document.getElementById('container'):document.all.container;
    }
    this.containerLayer = tmpLayer;
    if (browser.ns4 && browser.platform=='Win32') {
      this.containerLayer.clip.height=134;
      this.containerLayer.clip.width=127;
    }

  }
  
   Calendar.prototype.getFirstDOM = function() {
    var thedate = new Date();
    thedate.setDate(1);
    thedate.setMonth(this.month);
    thedate.setFullYear(this.year);
    return thedate.getDay();
  }

  Calendar.prototype.getDaysInMonth = function (){
     if (this.month!=1) {
     return this.daysInMonth[this.month]
     }
     else {
       // is it a leap year
        if (Date.isLeapYear(this.year)) {
        return 29;
      }
        else {
        return 28;
      }
     }
  }
   
  Calendar.prototype.buildString = function(){
    var tmpStr = '<form onSubmit="this.year.blur();return false;"><table width="100%" border="0" cellspacing="0" cellpadding="2" class="calBorderColor"><tr><td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
    tmpStr += '<tr>';
    tmpStr += '<td width="60%" class="cal" align="left">';
    if (this.hasDropDown) {
      tmpStr += '<select class="month" name="month" onchange="g_Calendar.selectChange();">';
    for (var i=0;i<this.months.length;i++){
        tmpStr += '<option value="' + i + '"' 
      if (i == this.month) tmpStr += ' selected';
      tmpStr += '>' + this.months[i] + '</option>';
      }
      tmpStr += '</select>';
    } else {
      tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td><a href="javascript: g_Calendar.changeMonth(-1);"><img name="calendar" src="/calendar/down.gif" width="8" height="12" border="0" alt=""></a></td><td class="cal" width="100%" align="center">' + this.months[this.month] + '</td><td class="cal"><a href="javascript: g_Calendar.changeMonth(+1);"><img name="calendar" src="/calendar/up.gif" width="8" height="12" border="0" alt=""></a></td></tr></table>';
    }
    tmpStr += '</td>';
    /* observation : for some reason if the below event is changed to 'onChange' rather than 'onBlur' it totally crashes IE (4 and 5)!
    */
    tmpStr += '<td width="40%" align="right" class="cal">';
    
    if (this.hasDropDown) { 
      tmpStr += '<input class="year" type="text" size="';
      // get round NS4 win32 lenght of year input problem
      (browser.ns4 && browser.platform=='Win32')?tmpStr += 1:tmpStr += 4;
    tmpStr += '" name="year" maxlength="4" onBlur="g_Calendar.inputChange();" value="' + this.year + '">';
    } else {
    tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td class="cal"><a href="javascript: g_Calendar.changeYear(-1);"><img name="calendar" src="/calendar/down.gif" width="8" height="12" border="0" alt=""></a></td><td class="cal" width="100%" align="center">' + this.year + '</td><td class="cal"><a href="javascript: g_Calendar.changeYear(+1);"><img name="calendar" src="/calendar/up.gif" width="8" height="12" border="0" alt=""></a></td></tr></table>'
    }
    tmpStr += '</td>';
    tmpStr += '</tr>';
    tmpStr += '</table>';
    var iCount = 1;

    var iFirstDOM = (7+this.getFirstDOM()-g_startDay)%7; // to prevent calling it in a loop

    var iDaysInMonth = this.getDaysInMonth(); // to prevent calling it in a loop
    
    tmpStr += '<table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
    tmpStr += '<tr>';
      for (var i=0;i<7;i++){
      tmpStr += '<td align="center" class="calDaysColor">' + this.daysOfWeek[(g_startDay+i)%7] + '</td>';
    }
    tmpStr += '</tr>';
    var tmpFrom = parseInt('' + this.dateFromYear + this.dateFromMonth + this.dateFromDay,10);
    var tmpTo = parseInt('' + this.dateToYear + this.dateToMonth + this.dateToDay,10);
    var tmpCompare;
    for (var j=1;j<=6;j++){
       tmpStr += '<tr>';
       for (var i=1;i<=7;i++){
       tmpStr += '<td width="16" align="center" '
       if ( (7*(j-1) + i)>=iFirstDOM+1  && iCount <= iDaysInMonth){
         if (iCount==this.day && this.year==this.oYear && this.month==this.oMonth) tmpStr += 'class="calHighlightColor"';
       else {
          if (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"';
        else tmpStr += 'class="cal"';
       }
         tmpStr += '>';
       /* could create a date object here and compare that but probably more efficient to convert to a number
         and compare number as numbers are primitives */
       tmpCompare = parseInt('' + this.year + padZero(this.month) + padZero(iCount),10);
       if (tmpCompare >= tmpFrom && tmpCompare <= tmpTo) {
         tmpStr += '<a class="cal" href="javascript: g_Calendar.clickDay(' + iCount + ');">' + iCount + '</a>';
       } else {
         tmpStr += '<span class="disabled">' + iCount + '</span>';
       }
       iCount++;
       } else {
         if  (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"'; else tmpStr +='class="cal"';
       tmpStr += '>&nbsp;';
       }
       tmpStr += '</td>'
     }
     tmpStr += '</tr>'
    }
    tmpStr += '</table></td></tr></table></form>'
    return tmpStr;
  }
  
  Calendar.prototype.selectChange = function(){
    this.month = browser.ns6?this.containerLayer.ownerDocument.forms[0].month.selectedIndex:this.containerLayer.document.forms[0].month.selectedIndex;
    this.writeString(this.buildString());
  }
  
  Calendar.prototype.inputChange = function(){
    var tmp = browser.ns6?this.containerLayer.ownerDocument.forms[0].year:this.containerLayer.document.forms[0].year;
    if (tmp.value >=1900 || tmp.value <=2100){
      this.year = tmp.value;
      this.writeString(this.buildString());
    } else {
      tmp.value = this.year;
    }
  }
  Calendar.prototype.changeYear = function(incr){
     (incr==1)?this.year++:this.year--;
     this.writeString(this.buildString());
  }
  Calendar.prototype.changeMonth = function(incr){
      if (this.month==11 && incr==1){
        this.month = 0;
        this.year++;
      } else {
        if (this.month==0 && incr==-1){
          this.month = 11;
        this.year--;
        } else {
        (incr==1)?this.month++:this.month--;
      }
    }
    this.writeString(this.buildString());
  }
  
  Calendar.prototype.clickDay = function(day){
     var tmp = eval('document.' + this.target);
     if (this.dateFormat=='dd-mmm-yyyy' || this.dateFormat=='dd/mmm/yyyy') tmp.value = day + this.dateDelim + this.months[this.month].substr(0,3) + this.dateDelim + this.year;
     if (this.dateFormat=='dd/mm/yyyy' || this.dateFormat=='dd-mm-yyyy') tmp.value = day + this.dateDelim + (this.month+1) + this.dateDelim + this.year;
     if (this.dateFormat=='mm/dd/yyyy' || this.dateFormat=='mm-dd-yyyy') tmp.value = (this.month+1) + this.dateDelim + day + this.dateDelim + this.year;
     if (this.dateFormat=='yyyy-mm-dd') tmp.value = this.year + this.dateDelim + (this.month+1) + this.dateDelim + day;
     if (this.dateFormat=='dd-mm-yyyy') tmp.value = padZero(day) + this.dateDelim + padZero(this.month+1) + this.dateDelim + this.year;
     
      if (browser.ns4) this.containerLayer.hidden=true;
      if (browser.dom || browser.ie4){
        this.containerLayer.style.visibility='hidden'
      }
  }
  
  Calendar.prototype.writeString = function(str){
    if (browser.ns4){
      this.containerLayer.document.open();
      this.containerLayer.document.write(str);
      this.containerLayer.document.close();
    } 
    if (browser.dom || browser.ie4){
      this.containerLayer.innerHTML = str;
    }
  }
  
  Calendar.prototype.show = function(event, target, bHasDropDown, dateFormat, dateFrom, dateTo){
    // calendar can restrict choices between 2 dates, if however no restrictions
    // are made, let them choose any date between 1900 and 3000
    if (dateFrom) this.dateFrom = dateFrom; else this.dateFrom = new Date(1900,0,1);
    this.dateFromDay = padZero(this.dateFrom.getDate());
    this.dateFromMonth = padZero(this.dateFrom.getMonth());
    this.dateFromYear = this.dateFrom.getFullYear();
    if (dateTo) this.dateTo = dateTo; else this.dateTo = new Date(3000,0,1);
    this.dateToDay = padZero(this.dateTo.getDate());
    this.dateToMonth = padZero(this.dateTo.getMonth());
    this.dateToYear = this.dateTo.getFullYear();
    this.hasDropDown = bHasDropDown;
    if (dateFormat) this.dateFormat = dateFormat; else this.dateFormat = 'dd-mm-yyyy';
    switch (this.dateFormat){
      case 'dd-mmm-yyyy':
      case 'dd-mm-yyyy':
      case 'yyyy-mm-dd':
        this.dateDelim = '-';
      break;
      case 'dd/mm/yyyy':
      case 'mm/dd/yyyy':
      case 'dd/mmm/yyyy':
        this.dateDelim = '/';
      break;
    }

    if (browser.ns4) {
      if (!this.containerLayer.hidden) {
        this.containerLayer.hidden=true;
        return;
      }
    }
    if (browser.dom || browser.ie4){
      if (this.containerLayer.style.visibility=='visible') {
        this.containerLayer.style.visibility='hidden';
        return;
      }  
    }

    if (browser.ie5 || browser.ie4){
      var event = window.event;
    }
    if (browser.ns4){
      this.containerLayer.x = event.x+10;
      this.containerLayer.y = event.y-5;
    }
    if (browser.ie5 || browser.ie4){
      var obj = event.srcElement;
       x = 0;
      while (obj.offsetParent != null) {
          x += obj.offsetLeft;
          obj = obj.offsetParent;
      }
      x += obj.offsetLeft;
      y = 0;
      var obj = event.srcElement;
      while (obj.offsetParent != null) {
          y += obj.offsetTop;
          obj = obj.offsetParent;
      }
      y += obj.offsetTop;
    
      this.containerLayer.style.left = x+35;
      if (event.y>0) this.containerLayer.style.top = y;
    }
    if (browser.ns6){
      this.containerLayer.style.left = event.pageX+10;
      this.containerLayer.style.top = event.pageY-5;
    }
    this.target = target;
    var tmp = eval('document.' + this.target);

    if (tmp && tmp.value && tmp.value.split(this.dateDelim).length==3 && tmp.value.indexOf('d')==-1){

      var atmp = tmp.value.split(this.dateDelim)
      switch (this.dateFormat){
       case 'dd-mmm-yyyy':
       case 'dd/mmm/yyyy':
         for (var i=0;i<this.months.length;i++){
           if (atmp[1].toLowerCase()==this.months[i].substr(0,3).toLowerCase()){
             this.month = this.oMonth = i;
             break;
           }
         }
         this.day = parseInt(atmp[0],10);
         this.year = this.oYear = parseInt(atmp[2],10);
         break;
       case 'dd/mm/yyyy':
       case 'dd-mm-yyyy':
         this.month = this.oMonth = parseInt(atmp[1]-1,10); 
         this.day = parseInt(atmp[0],10);
         this.year = this.oYear = parseInt(atmp[2],10);
         break;
       case 'mm/dd/yyyy':
       case 'mm-dd-yyyy':
         this.month = this.oMonth = parseInt(atmp[0]-1,10);
         this.day = parseInt(atmp[1],10);
         this.year = this.oYear = parseInt(atmp[2],10);
         break;
       case 'yyyy-mm-dd':
         this.month = this.oMonth = parseInt(atmp[1]-1,10);
         this.day = parseInt(atmp[2],10);
         this.year = this.oYear = parseInt(atmp[0],10);
         break;
      }
    } else { // no date set, default to today
      var theDate = new Date();
      this.year = this.oYear = theDate.getFullYear();
      this.month = this.oMonth = theDate.getMonth();
      this.day = this.oDay = theDate.getDate();
    }
    this.writeString(this.buildString());
    
    // and then show it!
    if (browser.ns4) {
      this.containerLayer.hidden=false;
    }
    if (browser.dom || browser.ie4){
      this.containerLayer.style.visibility='visible';
    }
  }
  
  Calendar.prototype.hide = function(){
    if (browser.ns4) this.containerLayer.hidden = true;
    if (browser.dom || browser.ie4){
      this.containerLayer.style.visibility='hidden';
    }
  }
  
  function handleDocumentClick(e){
    if (browser.ie4 || browser.ie5) e = window.event;

    if (browser.ns6){
      var bTest = (e.pageX > parseInt(g_Calendar.containerLayer.style.left,10) && e.pageX <  (parseInt(g_Calendar.containerLayer.style.left,10)+125) && e.pageY < (parseInt(g_Calendar.containerLayer.style.top,10)+125) && e.pageY > parseInt(g_Calendar.containerLayer.style.top,10));
      if (e.target.name!='imgCalendar' && e.target.name!='month'  && e.target.name!='year' && e.target.name!='calendar' && !bTest){
      g_Calendar.hide(); 
    }
    }
    if (browser.ie4 || browser.ie5){
    // extra test to see if user clicked inside the calendar but not on a valid date, we don't want it to disappear in this case
     var bTest = (e.x > parseInt(g_Calendar.containerLayer.style.left,10) && e.x <  (parseInt(g_Calendar.containerLayer.style.left,10)+125) && e.y < (parseInt(g_Calendar.containerLayer.style.top,10)+125) && e.y > parseInt(g_Calendar.containerLayer.style.top,10));
      if (e.srcElement.name!='imgCalendar' && e.srcElement.name!='month' && e.srcElement.name!='year' && !bTest & typeof(e.srcElement)!='object'){
      g_Calendar.hide(); 
    }
    }
    if (browser.ns4) g_Calendar.hide();
  }
  
  // utility function
  function padZero(num) {
    return ((num <= 9) ? ("0" + num) : num);
  }
    // Finally licked extending  native date object;
    Date.isLeapYear = function(year){ if (year%4==0 && ((year%100!=0) || (year%400==0))) return true; else return false; }
    Date.daysInYear = function(year){ if (Date.isLeapYear(year)) return 366; else return 365;}
    var DAY = 1000*60*60*24;
    Date.prototype.addDays = function(num){
    return new Date((num*DAY)+this.valueOf());
    }  
    
   // events capturing, careful you don't override this by setting something in the onload event of 
  // the body tag
  window.onload=function(){ 
    new Calendar(new Date());
    if (browser.ns4){
      if (typeof document.NSfix == 'undefined'){
      document.NSfix = new Object();
        document.NSfix.initWidth=window.innerWidth;
      document.NSfix.initHeight=window.innerHeight;
    }
    }
  }
  if (browser.ns4) window.onresize = function(){
    if (document.NSfix.initWidth!=window.innerWidth || document.NSfix.initHeight!=window.innerHeight) window.location.reload(false);
  } // ns4 resize bug workaround
  window.document.onclick=handleDocumentClick;
//    window.onerror = function(msg,url,line){
//    alert('******* an error has occurred ********' +
//    '\n\nPlease check that' + 
//    '\n\n1)You have not added any code to the body onload event,'
//    +  '\nif you want to run something as well as the calendar initialisation'
//    + '\ncode, add it to the onload event in the calendar library.'
//    + '\n\n2)You have set the parameters correctly in the g_Calendar.show() method '
//    + '\n\nSee www.totallysmartit.com\\examples\\calendar\\simple.asp for examples'
//    + '\n\n------------------------------------------------------'
//    + '\nError details'
//    + '\nText:' + msg + '\nurl:' + url + '\nline:' + line);
//  }


function checkdate(myfield,nxtfld) {
  var dt = myfield.value;
  var dt2 = '';
  var dd = '';
  var mm = '';
  var yy = '';

  if (dt == '') {return}
  
  if (dt.search(/^\d\d\D\d\d\D\d\d\d\d$/) == 0) {
    dt2 = dt;
  } else {
    if (dt.search(/^(\d\d?)\D(\d\d?)\D(\d\d|20\d\d)$/) == 0) {
      dd = RegExp.$1;
      mm = RegExp.$2;
      yy = RegExp.$3;
      dt2 += dd.replace(/^(\d)$/, "0$1") + "-";
      dt2 += mm.replace(/^(\d)$/, "0$1") + "-";
      dt2 += yy.replace(/^(\d\d)$/, "20$1");
    } else if (dt.search(/^(\d\d?)(\d\d?)(\d\d|20\d\d)$/) == 0) {
      dd = RegExp.$1;
      mm = RegExp.$2;
      yy = RegExp.$3;
      dt2 += dd.replace(/^(\d)$/, "0$1") + "-";
      dt2 += mm.replace(/^(\d)$/, "0$1") + "-";
      dt2 += yy.replace(/^(\d\d)$/, "20$1");
    }
  }
  if (dt2 == '') {
    alert("This date is not valid.\n\n" +
          "The following formats are acceptable:\n" +
          "ddmmyy, ddmmyyyy\n" +
          "dd/mm/yy, dd/mm/yyyy\n" +
          "dd-mm-yy, dd-mm-yyyy\n" +
          "\n(the day and month may be 1 or 2 digits)\n");
    myfield.select();
  } else {
    myfield.value = dt2;
    nxtfld.select();
  }
}
function numbersonly(myfield, e, extras) {
  // use onKeyPress="return numbersonly(this, event [, '.,'])"
  var key;
  var keychar;
  
  if (window.event)
     key = window.event.keyCode;
  else if (e)
     key = e.which;
  else
     return true;
  keychar = String.fromCharCode(key);
  if ((typeof extras) == 'undefined') {extras = ''}
  // control keys
  if ((key==null) || (key==0) || (key==8) || 
      (key==9) || (key==13) || (key==27) )
     return true;
  else if ((("0123456789" + extras).indexOf(keychar) > -1))
     return true;
  else
     return false;
}