function positionInfo(object) {

  var pos_element = object;

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

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

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

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

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

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

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(pos_property){
    var pos_element = calendarId;
    var element = null;

    if(typeof(pos_element) == "object"){
      element = pos_element;
    } else {
      element = document.getElementById(pos_element);
    }
    if (element != null){
      if(element.style){
        element = element.style;
        if(element[pos_property]){
          return element[pos_property];
        } else {
          return null;
        }
      } else {
        return null;
      }
    }
  }


  function setElementProperty(pos_property, pos_value, pos_elementId){
    var pos_element = pos_elementId;
    var element = null;

    if(typeof(pos_element) == "object"){
      element = pos_element;
    } else {
      element = document.getElementById(pos_element);
    }
    if((element != null) && (element.style != null)){
      element = element.style;
      element[ pos_property ] = pos_value;
    }
  }


  function setProperty(pos_property, pos_value) {
    setElementProperty(pos_property, pos_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.clearDate = clearDate;
  
  
  function clearDate() {
    dateField.value = '';
    hide();
    
  }

  this.setDate = setDate;
  
  
  function setDate(year, month, day) {
    if (dateField) {
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}
			if (year < 10) {year = "0" + year;}
      var dateString = month+"/"+day+"/"+year;
      dateField.value = dateString;
      hide();
    }
    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().getFullYear();
    return year;
  }

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

  function getCurrentDay() {
    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>";

    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 == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
            css_class = 'current';
          } else if (dayOfWeek == 0 || dayOfWeek == 6) {
            css_class = 'weekend';
          } 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='7' style='padding: 3px;'><a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
    table = table + "</table>";

    return table;
  }

  this.show = show;
  function show(field) {
    can_hide = 0;
  
	   if (dateField == field) {
      return;
    } else {
      dateField = field;
    }

    if(dateField) {
      try {
        var dateString = new String(dateField.value);
        var dateParts = dateString.split("/");
        
        selectedMonth = parseInt(dateParts[0],10);
        selectedDay = parseInt(dateParts[1],10);
        selectedYear = parseInt(dateParts[2],10);
        if (selectedYear < 65)
        	selectedYear =  selectedYear + 2000;
        else if (selectedYear>=65 && selectedYear<100 )
        	selectedYear =  selectedYear + 1900;
      }
      catch(e) {}
    }

    if (!(selectedYear && selectedMonth && selectedDay)) {
      selectedMonth = getCurrentMonth();
      selectedDay = getCurrentDay();
      selectedYear = getCurrentYear();
    }

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

    if(document.getElementById){

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

      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");
 
      if (document.all) {
        setElementProperty('display', 'block', 'CalendarControlIFrame');
        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;
    }
  }

  this.visible = visible;
  function visible() {
    return dateField
  }

  this.can_hide = can_hide;
  var can_hide = 0;
}

var calendarControl = new CalendarControl();

function showCalendarControl(textField) {
	clearLabel();
  calendarControl.show(textField);
}

function clearCalendarControl() {
  calendarControl.clearDate();
}

function hideCalendarControl() {
  if (calendarControl.visible()) {
    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 clearLabel(){
	var divText=document.getElementById("textOutputALJTime");
  if(divText.innerHTML!=""){
     divText.innerHTML = "";
  }
}

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