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 = ['1월','2월','3월','4월','5월','6월','7월','8월','9월','10월','11월','12월'];
  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) {
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}

      var dateString = year+"-"+month+"-"+day;
      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().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 cellspacing='0' cellpadding='0' border='0'>";
		table = table + "<tr class='header'>";
		table = table + "  <td colspan='2' class='previous'><a href='javascript:changeCalendarControlMonth(" + (currentMonth - 1) + ");' onMouseOut=document.PreImg.src='/images/calendar/left.jpg' onMouseOver=document.PreImg.src='/images/calendar/left_over.jpg'><img name='PreImg' src='/images/calendar/left.jpg' align='absmiddle' border='0' width='18'></a></td>";
		table = table + "  <td colspan='3' class='title'>";
		
		table = table + "<SELECT name='selectYear' id='selectYear' onChange='changeCalendarControlYear(selectYear.value);'>";
		for(var i = 2007; i < 2015; i++) {
			table = table + "<OPTION value='" + i + "'";
			if (i == currentYear) table = table + " selected";
			table = table + ">" + i + "</OPTION>";
		}
		table = table + "</SELECT>";
		
		table = table + "<SELECT name='selectMonth' id='clickMonth' onChange='changeCalendarControlMonth(selectMonth.value);'>";
		for(var i = 1; i < 13; i++) {
			table = table + "<OPTION value='" + i + "'";
			if (i == currentMonth) table = table + " selected";
			table = table + ">" + months[i-1] + "</OPTION>";
		}
		table = table + "</SELECT>";
		
		table = table + "  </td>";
		table = table + "  <td colspan='2' class='next'>";
		table = table + "    <a href='javascript:changeCalendarControlMonth(" + (currentMonth + 1) + ");' onMouseOut=document.NextImg.src='/images/calendar/right.jpg' onMouseOver=document.NextImg.src='/images/calendar/right_over.jpg'><img name='NextImg' src='/images/calendar/right.jpg' align='absmiddle' border='0' width='18'></a>";
		table = table + "  </td>";
		table = table + "</tr>";
		table = table + "<tr>";
		table = table + "  <td colspan='7' align='center' bgcolor='#C5C6C6' style='padding:2px;'>";
		table = table + "    <table width='100%' bgcolor='#FFFFFF' cellspacing='1' cellpadding='1' border='0'><tr><th><font color='#8A0104'>일</font></th><th>월</th><th>화</th><th>수</th><th>목</th><th>금</th><th><font color='#0538A0'>토</font></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) {
						css_class = 'weekstart';
					} else if (dayOfWeek == 6) {
						css_class = 'weekend';
					} else {
						css_class = 'weekday';
					}
					table = table + "<td width='19'><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
					dayOfMonth++;
				} else {
					table = table + "<td class='empty' width='19'>&nbsp;</td>";
				}
			}
			table = table + "</tr>";
		}
		table = table + "    </table>";
		table = table + "  </td>";
		table = table + "</tr>";
		table = table + "<tr class='footer'><th colspan='7' height='18' style='padding:1px;'><a href='javascript:clearCalendarControl();'>삭제</a> | <a href='javascript:hideCalendarControl();'>닫기</a></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 = new String(dateField.value);
        var dateParts = dateString.split("-");
        
        selectedYear = parseInt(dateParts[0],10);
        selectedMonth = parseInt(dateParts[1],10);
        selectedDay = 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);

      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;
    }
  }

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

var calendarControl = new CalendarControl();

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

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

function hideCalendarControl(flag) {
  if (calendarControl.visible()) {
    if (flag) {
      calendarControl.hide();
    } else {
      window.setTimeout('hideCalendarControl(true)',200);
    }
  }
}

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' style='border:1px solid #6E6E6E;'></div>");