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.clearDate = clearDate;
  function clearDate() {
    dateField.value = '';
    hide();
  }

  this.setDate = setDate;
  function setDate(year, month, day) {
    if (dateField) {
	  var wdArray = new Array("Sun","Mon", "Tue", "Wed", "Thu", "Fri", "Sat")
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}
	  year = ""+year;
      var dateString = month+"-"+day+"-"+year;
	  var ix = 0;
	  var yearSelectedIndex = 0;
	  for ( var iy=document.travel.startYear.value; iy<=document.travel.endYear.value; iy++) {
	  		if (iy == year){yearSelectedIndex = ix}
			ix++;
	  }
	  if (document.travel.arde.value == "arr"){
		  document.travel.arrD.options[day-1].selected=1
		  document.travel.arrM.options[month-1].selected=1
		  document.travel.arrY.options[yearSelectedIndex].selected=1
		  var selectedDate	=	new Date(year,month-1,day)
		  document.travel.aday.value=wdArray[selectedDate.getDay()]
	  } else {
		  document.travel.depD.options[day-1].selected=1
		  document.travel.depM.options[month-1].selected=1
		  document.travel.depY.options[yearSelectedIndex].selected=1
		  var selectedDate	=	new Date(year,month-1,day)
		  document.travel.dday.value=wdArray[selectedDate.getDay()]
	  }
      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) {
	var newCalYear = currentYear + change;
	if (newCalYear > document.travel.endYear.value){currentYear = currentYear}
	else if (newCalYear < document.travel.startYear.value){currentYear = currentYear}
    else {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() {
    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 border='0' width='220' cellspacing='0' cellpadding='0' style='border:1px solid #F69600'>";

    table = table + "<tr class='header'>";
    table = table + "  <td colspan='7' class='header'>";
	table = table + "  <table border='0' width='100%' cellspacing='1' cellpadding='0'>";
	table = table + "  <tr>";
	table = table + "      <td><a href='javascript:changeCalendarControlMonth(-1);'><img src='/img/common/lcal.gif' width=12 height=14 alt='' border='0'></a></td>";
	table = table + "      <td class='navigation' width='80'>"+months[currentMonth-1]+"</td>";
	table = table + "      <td><a href='javascript:changeCalendarControlMonth(1);'><img src='/img/common/rcal.gif' width=12 height=14 alt='' border='0'></a></td>";
	table = table + "      <td nowrap>&nbsp;&nbsp;&nbsp;</td>";
	table = table + "      <td><a href='javascript:changeCalendarControlYear(-1);'><img src='/img/common/lcal.gif' width=12 height=14 alt='' border='0'></a></td>";
	table = table + "      <td class='navigation'>"+currentYear+"</td>";
	table = table + "      <td><a href='javascript:changeCalendarControlYear(1);'><img src='/img/common/rcal.gif' width=12 height=14 alt='' border='0'></a></td>";
	table = table + "  </tr>";
	table = table + "  </table>";
	table = table + "  </td>";
	table = table + "  </tr>";	
    table = table + "<tr><th align='center'><b>Su</b></th><th align='center'><b>Mo</b></th><th align='center'><b>Tu</b></th><th align='center'><b>We</b></th><th align='center'><b>Th</b></th><th align='center'><b>Fr</b></th><th align='center'><b>Sa</b></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='footer'><th colspan='7' style='padding: 3px;'><a href='javascript:clearCalendarControl();'>Clear</a> | <a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
    table = table + "</table>";

    return table;
  }

  this.show = show;
  function show(field) {
    can_hide = 0;
    // 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 = new String(dateField.value);
        var dateParts = dateString.split("-");
        
        selectedMonth = parseInt(dateParts[0],10);
        selectedDay = parseInt(dateParts[1],10);
        selectedYear = parseInt(dateParts[2],10);
      } 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,arrOrDep) {
  // textField.onblur = hideCalendarControl;
  document.travel.arde.value = arrOrDep;
  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);
}
//----------------------------------------------------------------------
document.write("<iframe id='CalendarControlIFrame' src='javascript:false;' frameBorder='0' scrolling='no'></iframe>");
document.write("<div id='CalendarControl'></div>");