var pastDateSelect = false;
var pastDateShow = false;
function positionInfo(object) {

  var p_elm = object;

  this.getElementLeft = getElementLeft;
  function getElementLeft() {
    var x = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      x+= elm.offsetLeft;
      elm = elm.offsetParent;
    }
    return parseInt(x);
  }

  this.getElementWidth = getElementWidth;
  function getElementWidth(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetWidth);
  }

  this.getElementRight = getElementRight;
  function getElementRight(){
    return getElementLeft(p_elm) + getElementWidth(p_elm);
  }

  this.getElementTop = getElementTop;
  function getElementTop() {
    var y = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      y+= elm.offsetTop;
      elm = elm.offsetParent;
    }
    return parseInt(y);
  }

  this.getElementHeight = getElementHeight;
  function getElementHeight(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetHeight);
  }

  this.getElementBottom = getElementBottom;
  function getElementBottom(){
    return getElementTop(p_elm) + getElementHeight(p_elm);
  }
}

function CalendarControl() {

  var calendarId = 'CalendarControl';
  var currentYear = 0;
  var currentMonth = 0;
  var currentDay = 0;

  var selectedYear = 0;
  var selectedMonth = 0;
  var selectedDay = 0;

  var months = ['January','February','March','April','May','June','July','August','September','October','November','December'];
  var dateField = null;

  function getProperty(p_property){
    var p_elm = calendarId;
    var elm = null;

    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if (elm != null){
      if(elm.style){
        elm = elm.style;
        if(elm[p_property]){
          return elm[p_property];
        } else {
          return null;
        }
      } else {
        return null;
      }
    }
  }

  function setElementProperty(p_property, p_value, p_elmId){
    var p_elm = p_elmId;
    var elm = null;

    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if((elm != null) && (elm.style != null)){
      elm = elm.style;
      elm[ p_property ] = p_value;
    }
  }

  function setProperty(p_property, p_value) {
    setElementProperty(p_property, p_value, calendarId);
  }

  function getDaysInMonth(year, month) {
    return [31,((!(year % 4 ) && ( (year % 100 ) || !( year % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][month-1];
  }

  function getDayOfWeek(year, month, day) {
    var date = new Date(year,month-1,day)
    return date.getDay();
  }

  this.setDate = setDate;
  function setDate(year, month, day) {
    if (dateField) {
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}

      //var dateString = month+"-"+day+"-"+year;
      var dateString = day+"/"+month+"/"+year;
      if (dateField.type && ( dateField.type == 'text') )
      {
         dateField.value = dateString;
      }
      else
      {
          dateField.innerHTML = dateString;
      }
      hide();
      var inStrDt = document.getElementById('submitDateChange');
      if (inStrDt)
      {
         clickSubmitButton( 'submitDateChange', false);
      }
    }
    return;
  }

  this.changeMonth = changeMonth;
  function changeMonth(change) {
    currentMonth += change;
    currentDay = 0;
    if(currentMonth > 12) {
      currentMonth = 1;
      currentYear++;
    } else if(currentMonth < 1) {
      currentMonth = 12;
      currentYear--;
    }

    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }

  this.changeYear = changeYear;
  function changeYear(change) {
    currentYear += change;
    currentDay = 0;
    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }

  function getCurrentYear() {
    var year = new Date().getYear();
    if(year < 1900) year += 1900;
    return year;
  }

  function getCurrentMonth() {
    return new Date().getMonth() + 1;
  } 

  function getCurrentDay() {
  	var myDate=new Date()
	myDate.setDate(myDate.getDate()+1)
	return myDate.getDate();
    //return new Date().getDate();
  }

  function calendarDrawTable() {

    var dayOfMonth = 1;
    var validDay = 0;
    var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
    var daysInMonth = getDaysInMonth(currentYear, currentMonth);
    var css_class = null; //CSS class for each day

    var table = "<table cellspacing='0' cellpadding='0' border='0'>";
    table = table + "<tr class='header'>";
    table = table + "  <td colspan='2' class='previous'><a href='javascript:changeCalendarControlMonth(-1);'>&lt;</a> <a href='javascript:changeCalendarControlYear(-1);'>&laquo;</a></td>";
    table = table + "  <td colspan='3' class='title'>" + months[currentMonth-1] + "<br>" + currentYear + "</td>";
    table = table + "  <td colspan='2' class='next'><a href='javascript:changeCalendarControlYear(1);'>&raquo;</a> <a href='javascript:changeCalendarControlMonth(1);'>&gt;</a></td>";
    table = table + "</tr>";
    table = table + "<tr><th>S</th><th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th></tr>";

    var today = getCurrentDay();
    var thisMonth = getCurrentMonth();
    var thisYear = getCurrentYear();

    for(var week=0; week < 6; week++) {
      table = table + "<tr>";
      for(var dayOfWeek=0; dayOfWeek < 7; dayOfWeek++) {
        if(week == 0 && startDayOfWeek == dayOfWeek) {
          validDay = 1;
        } else if (validDay == 1 && dayOfMonth > daysInMonth) {
          validDay = 0;
        }

        if(validDay) {
          if (dayOfMonth < today && currentYear == thisYear && currentMonth == thisMonth) {
              if (pastDateSelect)
              {
                  css_class = 'weekday';
                  table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
              }
              else
              {
                  css_class = 'past';
                  table = table + "<td><a class='"+css_class+"'>"+dayOfMonth+"</td>";
              }
            
          } else if (currentYear == thisYear && currentMonth < thisMonth) {
              if (pastDateSelect)
              {
                  css_class = 'weekday';
                  table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
              }
              else
              {
                  css_class = 'past';
                  table = table + "<td><a class='"+css_class+"'>"+dayOfMonth+"</td>";
              }
            
          } else if (currentYear < thisYear) {
              if (pastDateSelect)
              {
                  css_class = 'weekday';
                  table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
              }
              else
              {
                  css_class = 'past';
                  table = table + "<td><a class='"+css_class+"'>"+dayOfMonth+"</td>";
              }            
          } else  if (dayOfMonth == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
            css_class = 'current';
            table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
          } else if (dayOfWeek == 0 || dayOfWeek == 6) {
            css_class = 'weekend';
            table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
          } else {
            css_class = 'weekday';
            table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
          }

          dayOfMonth++;
        } else {
          table = table + "<td class='empty'>&nbsp;</td>";
        }
      }
      table = table + "</tr>";
    }

    table = table + "<tr class='header'><th colspan='3' style='padding: 3px;'><a href='javascript:setCalendarControlDate("+thisYear+","+thisMonth+","+today+");'>Today</a></th><th colspan='4' style='padding: 3px;'><a href='javascript:hideCalendarControl();'>Close</a></th></tr>";
    table = table + "</table>";

    return table;
  }

  this.show = show;
  function show(field) {
  
    // If the calendar is visible and associated with
    // this field do not do anything.
    if (dateField == field) {
      return;
    } else {
      dateField = field;
    }

    if(dateField) {
      try {
        var dateString;
        if (dateField.value)
        {
            dateString = new String(dateField.value);
        }
        else
        {
            dateString = new String(dateField.innerHTML);
        }
        var dateParts = dateString.split("/");
        selectedDay = parseInt(dateParts[0],10);
        selectedMonth = parseInt(dateParts[1],10);
        selectedYear = parseInt(dateParts[2],10);
      } catch(e) {}
    }

    if (!(selectedYear && selectedMonth && selectedDay)) {
        if (!pastDateShow)
        {
            selectedMonth = getCurrentMonth();
            selectedDay = getCurrentDay();
            selectedYear = getCurrentYear();
        }
        else
        {
            selectedMonth = '01';
            selectedDay = '01';
            selectedYear = '1980';
        }
    }

    currentMonth = selectedMonth;
    currentDay = selectedDay;
    currentYear = selectedYear;

    if(document.getElementById){

      calendar = document.getElementById(calendarId);
      calendar.innerHTML = calendarDrawTable(currentYear, currentMonth);

      setElementProperty('display', 'block', 'CalendarControlIFrame');
      setProperty('display', 'block');

      var fieldPos = new positionInfo(dateField);
      var calendarPos = new positionInfo(calendarId);

      var x = fieldPos.getElementLeft();
      var y = fieldPos.getElementBottom();

      setProperty('left', x + "px");
      setProperty('top', y + "px");
      setElementProperty('left', x + "px", 'CalendarControlIFrame');
      setElementProperty('top', y + "px", 'CalendarControlIFrame');
      setElementProperty('width', calendarPos.getElementWidth() + "px", 'CalendarControlIFrame');
      setElementProperty('height', calendarPos.getElementHeight() + "px", 'CalendarControlIFrame');
    }
  }

  this.hide = hide;
  function hide() {
    if(dateField) {
      setProperty('display', 'none');
      setElementProperty('display', 'none', 'CalendarControlIFrame');
      dateField = null;
    }
  }
}

var calendarControl = new CalendarControl();

function showCalendarControl(textField, pastDateSelc, pastDateShw) {
  if (pastDateSelc)
  {
      pastDateSelect = pastDateSelc;
  }
  if (pastDateShw)
  {
      pastDateShow = pastDateShw;
  }
  calendarControl.show(textField);
}

function hideCalendarControl() {
  calendarControl.hide();
}

function setCalendarControlDate(year, month, day) {
  calendarControl.setDate(year, month, day);
}

function changeCalendarControlYear(change) {
  calendarControl.changeYear(change);
}

function changeCalendarControlMonth(change) {
  calendarControl.changeMonth(change);
}

function clickSubmitButton(elmId,check) {
   var evt = null,
       elm = null;

   if(document.getElementById) {
     elm = document.getElementById(elmId);
   }
   if(document.createEvent) {
     evt = document.createEvent('MouseEvents');
   }
   if(document.createEventObject)
   {
    evt = document.createEventObject('MouseEvents');
   }
   if(elm && elm.fireEvent)
   {
   elm.fireEvent("onclick");
   }
   if(elm && elm.dispatchEvent && evt && evt.initMouseEvent) {
     evt.initMouseEvent(
       'click',
       true,     // Click events bubble
       true,     // and they can be cancelled
       document.defaultView,  // Use the default view
       1,        // Just a single click
       0,        // Don't bother with co-ordinates
       0,
       0,
       0,
       false,    // Don't apply any key modifiers
       false,
       false,
       false,
       0,        // 0 - left, 1 - middle, 2 - right
       null);    // Click events don't have any targets other than
                 // the recipient of the click

     elm.dispatchEvent(evt);
}
  if(!check && elm)
  {
      elm.onclick=null;
  }
}

document.write("<iframe id='CalendarControlIFrame' src='javascript:false;' frameBorder='0' scrolling='no'></iframe>");
document.write("<div id='CalendarControl'></div>");