var week=new Array('日','一','二','三','四','五','六');
var titles = {year:'年',month:'月',hour:'时',minute:'分',subYear:'上一年',subMonth:'上一月',addYear:'下一年',addMonth:'下一月',ok:'确定', clear:'清除',close:'关闭'}
var msgs = {'errformat':'日期格式有误! \n请输入格式如 {0} 的日期'}

function dateSelector()  
{
  var myDate=__TODAY;
  this.year=myDate.getFullYear();  
  this.month=myDate.getMonth();  
  this.date=myDate.getDate();  
  this.hour=myDate.getHours();
  this.minute=myDate.getMinutes(); 
  this.inputObj = null;  
  this.allowEmpty = true;
  this.showTime = false;
  this.postBack = false;
  this.pattern = "yyyy-MM-dd";
  this.origYear = this.year;
  this.origMonth = this.month;
  this.origDate = this.date;
  this.selectedDayElem = null;
  this.initial=function() {
		if ($.browser.msie && $.browser.version < 7.0) document.write("<iframe id='co_covering' style='z-index:1000;position:absolute;display:none;width:185px' noscrolling='true' frameborder='0'></iframe>");
		document.write("<div id='co_calendar' style='z-index:1001;position:absolute;display:none;text-align:center;overflow:visible' onselectstart='return false;'>");
		document.write("  <div style='width:185px;background-color:#f2f5f7;border:1px solid #dddddd;' class=ds_font>");
		document.write("    <table cellpadding=0 cellspacing=1 width='100%' height=25 bgcolor=#deedf7>");
		document.write("      <tr align=center>");
		document.write("        <td class='ds_normal' width=12% onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=addYear(this,-1) title='" + titles['subYear'] + "'>&lt;&lt;</td>");
		document.write("        <td class='ds_normal' width=12% onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=addMonth(this,-1) title='" + titles['subMonth'] + "'>&lt;</td>");
		document.write("        <td id='co_calendar_y'><select id='co_sel_year' onchange='doChangeYear(this.value)'></select></td><td id='co_calendar_m'><select id='co_sel_month' onchange='doChangeMonth(this.value)'></select></td>");
		document.write("        <td class='ds_normal' width=12% onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=addMonth(this,1) title='" + titles['addYear'] + "'>&gt;</td>");
		document.write("        <td class='ds_normal' width=12% onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=addYear(this,1) title='" + titles['addMonth'] + "'>&gt;&gt;</td>");
		document.write("      </tr>");
		document.write("    </table>");
	
		document.write("    <table cellpadding=0 cellspacing=0 width=100% height=20>");
		document.write("      <tr align=center>");
		for(i=0;i<7;i++) {
			document.write("      <td>"+week[i]+"</td>");
		}
		document.write("      </tr>");
		document.write("    </table>");
	
		document.write("    <table id='co_calendar_days' cellpadding=0 cellspacing=2 width=100% bgcolor=#f2f5f7>");
		for(i=0;i<6;i++)
		{
			document.write("    <tr align=center>");
			for(j=0;j<7;j++)
			document.write("    <td style='font-size:13px;' width=10% height=18 onmouseover=if(this.className=='ds_normal')this.className='ds_over' onmouseout=if(this.className=='ds_over')this.className='ds_normal'></td>");
			document.write("    </tr>");
		}
		document.write("    </table>");
		document.write("    <table id='co_calendar_times' width=100% style='margin-bottom:5px;display:none' align='center' cellpadding=1 cellspacing=1 bgcolor=#CEDAE7>");
		document.write("    	<tr><td align=center width=12% onmouseover=this.className='ds_normal' onmouseout=this.className='' onclick=addHour(this,-1)>&lt;&lt;</td>");
		document.write("        <td align=center width=12% onmouseover=this.className='ds_normal' onmouseout=this.className='' onclick=addMinute(this,-5)>&lt;</td>");
		document.write("				<td><select id='co_sel_hour' onchange=doChangeHour(this.value)></select></td><td><select id='co_sel_minute' onchange=doChangeMinute(this.value)></select></td>");
		document.write("				<td align=center width=12% onmouseover=this.className='ds_normal' onmouseout=this.className='' onclick=addMinute(this,5)>&gt;</td>");
		document.write("				<td align=center width=12% onmouseover=this.className='ds_normal' onmouseout=this.className='' onclick=addHour(this,1)>&gt;&gt;</td></tr>");
		document.write("    </table>");
		document.write("    <span  id='co_calendar_ok' class='ds_normal' onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal'>" + titles['ok'] + "</span>");
		document.write("    <span id='co_calendar_clear' class='ds_normal' onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=clearDate()>" + titles['clear'] + "</span>");
		document.write("    <span class='ds_normal' onmouseover=this.className='ds_over' onmouseout=this.className='ds_normal' onclick=dateSel.hide()>" + titles['close'] + "</span>");
		document.write("  </div>");
		document.write("</div>");
  		$("#co_calendar_ok").bind('click', true, selectDate);
  }
  
  function selectDate(evt) {
		if (dateSel.showTime && evt.data != true) {
			if (dateSel.selectedDayElem != null) {
				dateSel.selectedDayElem.className = '';
			}
			evt.target.className = 'ds_selected';
			dateSel.selectedDayElem = evt.target;
		}
		if (evt.data != true) {
			dateSel.date = parseInt(evt.target.innerHTML);
		}
		if (!dateSel.showTime || evt.data == true) {
			if (dateSel.inputObj) {
				var existedValue = dateSel.inputObj.value;
				dateSel.inputObj.value = getDateString(dateSel.year,
						dateSel.month + 1, dateSel.date, dateSel.hour,
						dateSel.minute, dateSel.pattern);
				$(dateSel.inputObj).blur();
				if (dateSel.postBack && existedValue != dateSel.inputObj.value) {
					__doPostBack(dateSel.id, '');
				}
				if (typeof(dateSel.inputObj.onchange) == 'function'
						&& existedValue != dateSel.inputObj.value) {
					dateSel.inputObj.onchange.call(dateSel.inputObj,
							existedValue);
				}
			}
			dateSel.hide();
		}
	}

  this.setCurrent = function() {
		var myDate=__TODAY;
		this.year=myDate.getFullYear();  
		this.month=myDate.getMonth();  
		this.date=myDate.getDate(); 
	}
	this.refreshDate = function() {
		var myDate=new Date(this.year,this.month, 1);
		var today=__TODAY;
		var day=myDate.getDay();
		var length;
		switch(this.month + 1)
		{
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
			length=31;
			break;
			case 4:
			case 6:
			case 9:
			case 11:
			length=30;
			break;
			case 2:
			if((this.year%4==0)&&(this.year%100!=0)||(this.year%400==0))
				length=29;
			else
				length=28;
		}
		var obj = document.getElementById('co_calendar_days');
		for(i=0;i<obj.rows.length;i++)
		{
			for (j = 0; j < 7; j ++) {
				obj.rows[i].cells[j].innerHTML='';
				obj.rows[i].cells[j].className='ds_disabled';
				obj.rows[i].cells[j].onclick = null;
			}
		}
		for(i=0;i<length;i++)
		{
			var r = Math.floor((i+day)/7);
			var c = i + day - r * 7;
			var dtd = obj.rows[r].cells[c];
			dtd.innerHTML=(i+1);
			dtd.className='ds_normal';
			if(this.year==today.getFullYear()&&this.month==today.getMonth()&&(i+1)==today.getDate())
				dtd.className='ds_today';
			if(this.origYear==this.year&&this.origMonth==this.month&&this.origDate == (i+1)) {
				dtd.className='ds_selected';
				this.selectedDayElem = obj.rows[r].cells[c];
			}
			var matchResult = this.inputObj.className.match(/(before|after)(#\w+)?/);
			if (matchResult != null && matchResult.length > 1) {
				var otherDate = today;
				if (matchResult.length > 2 && matchResult[2]) {
					var otherDp = document.getElementById(matchResult[2].substr(1));
					if (otherDp != null && otherDp.value.length > 0) {
						var otherDateArr = extractDate(otherDp.value, this.pattern);
						otherDate = new Date(otherDateArr[0], otherDateArr[1], otherDateArr[2]);
					}
				}
				var thisDate = new Date(this.year, this.month, (i+1));
				if (thisDate.getTime() > otherDate.getTime() && matchResult[1] == 'before') {
					
					dtd.className = 'ds_disabled';
				} else if (thisDate.getTime() < otherDate.getTime() && matchResult[1] == 'after') {
					dtd.className = 'ds_disabled';
				}
			}
			if (dtd.className != 'ds_disabled') {
				$(dtd).bind('click', selectDate);
			} else {
				$(dtd).unbind('click');
			}
		}
		var selYear = document.getElementById('co_sel_year');
		if (selYear.options.length == 0) {
			for(i = this.year - 20; i < this.year + 5; i ++) {
				var op = document.createElement("OPTION");
				op.text = i;
				op.value = i;
				selYear.options.add(op);
				if (i == this.year) {
					op.selected = true;
				}
			}
		} else {
			if (parseInt(selYear.options[selYear.options.length - 1].value) < this.year) {
				for (i=0;i<5;i++) {
					selYear.options.remove(0);
				}
				for (i=this.year;i<this.year+5;i++) {
					var op = document.createElement("OPTION");
					op.text = i;
					op.value = i;
					selYear.options.add(op);
				}
			} else if (parseInt(selYear.options[0].value) > this.year) {
				for(i=0;i<5;i++) {
					selYear.options.remove(selYear.options.length - 1);
				}
				for (i=this.year;i>this.year-5;i--) {
					var op = document.createElement("OPTION");
					op.text = i;
					op.value = i;
					selYear.options.add(op, 0);
				}
			}
			selYear.value = this.year;
		}
		var selMonth = document.getElementById('co_sel_month');
		if (selMonth.options.length == 0) {
			for(i = 1; i <= 12; i ++) {
				var op = document.createElement("OPTION");
				op.text = i + titles['month'];
				op.value = i;
				selMonth.options.add(op);
				if (i == this.month + 1) {
					op.selected = true;
				}
			}
		} else {
			selMonth.selectedIndex = this.month;
		}
  }
  
  this.refreshTime = function() {
  	if (this.showTime) {
			document.getElementById('co_calendar_times').style.display = '';
			var selHour = document.getElementById('co_sel_hour');
			if (selHour.options.length == 0) {
				for (i=0;i<24;i++) {
					var op = document.createElement("OPTION");
					op.text = i + titles['hour'];
					op.value = i;
					selHour.options.add(op);
				}
			}
			selHour.value = this.hour;
			
			var selMinute = document.getElementById('co_sel_minute');
			if (selMinute.options.length == 0) {
				for (i=0;i<60;i=i+5) {
					var op = document.createElement("OPTION");
					op.text = i + titles['minute'];
					op.value = i;
					selMinute.options.add(op);
				}
			}
			var nearestMinute = Math.round(this.minute/5)*5;
			selMinute.value = nearestMinute==60 ? 0 : nearestMinute;
			
		} else {
			document.getElementById('co_calendar_times').style.display = 'none';
		}
  }
	
	this.show = function(obj, x, y) {
		this.refreshDate();
		if (this.showTime) {
			this.refreshTime();
		}
		
		var cal = document.getElementById('co_calendar');
		
		cal.style.display = '';

		if (typeof(x) == 'undefined' || typeof(y) == 'undefined') {
			var ofs = $(obj).offset();
			var po = [ofs.left, ofs.top];
			
			x = po[0];
			y = po[1] + obj.offsetHeight;
			if (po[1] + cal.clientHeight + obj.offsetHeight > document.body.clientHeight) {
				if (po[1] - cal.clientHeight >= 0) {
					y = po[1] - cal.clientHeight;
				}
			} 
			if (po[0] + cal.clientWidth > document.body.clientWidth + document.body.scrollLeft) {
				x = document.body.clientWidth + document.body.scrollLeft - cal.clientWidth;
			}
		}
		$(cal).css("left", x).css("top", y);
		if ($.browser.msie && $.browser.version < 7.0) {
			$('#co_covering').css("display", '').css("top", y).css("left", x).css('height', cal.clientHeight);
		}
  }
  
	this.hide = function() {
		var cal = document.getElementById('co_calendar');
		if ($.browser.msie && $.browser.version < 7.0) {
			var covering = document.getElementById('co_covering');
			
			covering.style.display = 'none';
		}
		cal.style.display = 'none';
	}
}

var dateSel = new dateSelector();
dateSel.initial();

if (document.attachEvent) {
	document.attachEvent("onmouseup", clickSpace);
} else {
	document.addEventListener("mouseup", clickSpace, false);
}

function clickSpace(evt) {
	var evt = evt || window.event;
	var elm = evt.srcElement || evt.target;
	if (elm.tagName == 'SELECT' && elm.id.length > 6 && elm.id.substr(0, 7) == 'co_sel_') {
		return;
	}
	var cal = document.getElementById('co_calendar');
	if (!isAncensor(cal, elm)) {
		dateSel.hide();
	}
}

function isAncensor(anc, child) {
	while (child) {
		if (child == anc) {
			return true;
		}
		child = child.parentNode;
	}
	return false;
}

function addYear(obj,year)
{
	dateSel.year += year;
	dateSel.refreshDate();
}

function addMonth(obj,month)  
{
	dateSel.month += month;
	if (dateSel.month > 11) {
		dateSel.month = 0;
		dateSel.year += 1;
	}
	if (dateSel.month < 0) {
		dateSel.month = 11;
		dateSel.year -= 1;
	}
	dateSel.refreshDate();
}

function addHour(obj, hour) {
	dateSel.hour += hour;
	if (dateSel.hour < 0) {
		dateSel.hour = 0;
	}
	if (dateSel.hour > 23) {
		dateSel.hour = 23;
	}
	dateSel.refreshTime();
}
function addMinute(obj, minute) {
	dateSel.minute += minute;
	if (dateSel.minute < 0) {
		dateSel.minute = 55;
		addHour(null, -1);
	}
	if (dateSel.minute > 55) {
		dateSel.minute = 0;
		addHour(null, 1);
	}
	dateSel.refreshTime();
}

function doChangeYear(ystr){
	dateSel.year = parseInt(ystr);
	dateSel.refreshDate();
}

function doChangeMonth(mstr){
	dateSel.month = parseInt(mstr)-1;
	dateSel.refreshDate();
}

function doChangeHour(hstr) {
	dateSel.hour = parseInt(hstr);
}
function doChangeMinute(mi) {
	dateSel.minute=parseInt(mi);
}
function clearDate() {
	if (dateSel.inputObj) {
		dateSel.inputObj.value = "";
	}
	dateSel.hide();
}


function cumulativeOffset(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return [valueL, valueT];
}

function getDateString(year, month, date, hour, minute, pattern) {
	var ys = year.toString();
	var yi = ys.length - 1;
	var r = "";
	for (var i = pattern.length - 1; i >= 0; i--) {
		var c = pattern.charAt(i);
		if (c == 'y') {
			if (yi < 0) {
				r += '0';
			} else {
				r += ys.charAt(yi);
			}
			yi --;
		} else if (c == 'M') {
			if (i-1 >= 0 && pattern.charAt(i-1) == c) {
				if (month < 10) {
					r += month.toString() + '0';
				} else {
					r += reverse(month.toString());
				}
				i--;
			} else {
					r += reverse(month.toString());
			}
		} else if (c == 'd') {
			if (i-1 >= 0 && pattern.charAt(i-1) == c) {
				if (date < 10) {
					r += date.toString() + '0';
				} else {
					r += reverse(date.toString());
				}
				i--;
			} else {
				r += reverse(date.toString());
			}
		} else if (c == 'h'||c=='H') {
			if (i-1 >= 0 && pattern.charAt(i-1) == c) {
				if (hour < 10) {
					r += hour.toString() + '0';
				} else {
					r += reverse(hour.toString());
				}
				i--;
			} else {
				r += reverse(hour.toString());
			}
		} else if (c == 'm') {
			if (i-1 >= 0 && pattern.charAt(i-1) == c) {
				if (minute < 10) {
					r += minute.toString() + '0';
				} else {
					r += reverse(minute.toString());
				}
				i--;
			} else {
				r += reverse(minute.toString());
			}
		} else {
			r += c;
		}
	}
	return reverse(r);
}

function reverse(str) {
	var r = "";
	for (var i = str.length - 1; i >= 0; i --) {
		r += str.charAt(i);
	}
	return r;
}

function isDigit(c) {
	var isd = c >= '0' && c <= '9';
	return isd;
}
function extractDate(datestr, pattern) {
	var y = "";
	var m = "";
	var d = "";
	var h = "";
	var mi = "";
	var j = 0;
	for (var i = 0 ; i < pattern.length; i++) {
		var c = pattern.charAt(i);
		if (c == 'y') {
			if (i + 1 < pattern.length && pattern.charAt(i+1) == c) {
				if (i + 3 < pattern.length && pattern.charAt(i + 2) == c && pattern.charAt(i+3) == c) {
					y = datestr.substr(j, 4);
					i += 3;
					j += 4;
				} else {
					var today = __TODAY
					y = today.getFullYear().toString().substr(0, 2) + datestr.substr(j, 2);
					i += 1;
					j += 2;
				}
			}
		} else if (c == 'M') {
				if (isDigit(datestr.charAt(j+1))) {
					m = datestr.substr(j, 2);
					j += 2;
				} else {
					m = datestr.substr(j, 1);
					j ++;
				}
				if (i + 1 < pattern.length && pattern.charAt(i+1) == c) {
					i ++;
				}
		} else if (c == 'd') {
				if (isDigit(datestr.charAt(j+1))) {
					d = datestr.substr(j, 2);
					j += 2;
				} else {
					d = datestr.substr(j, 1);
					j ++;
				}
				if (i + 1 < pattern.length && pattern.charAt(i+1) == c) {
					i ++;
				}
		} else if (c == 'h'||c=='H') {
				if (isDigit(datestr.charAt(j+1))) {
					h = datestr.substr(j, 2);
					j += 2;
				} else {
					h = datestr.substr(j, 1);
					j ++;
				}
				if (i + 1 < pattern.length && pattern.charAt(i+1) == c) {
					i ++;
				}
		} else if (c == 'm') {
				if (isDigit(datestr.charAt(j+1))) {
					mi = datestr.substr(j, 2);
					j += 2;
				} else {
					mi = datestr.substr(j, 1);
					j ++;
				}
				if (i + 1 < pattern.length && pattern.charAt(i+1) == c) {
					i ++;
				}
		} else {
			j ++;
		}
	}
	if (m.charAt(0) == '0') m = m.substring(1);
	if (d.charAt(0) == '0') d = d.substring(1);
	if (h.charAt(0) == '0') h = h.substring(1);
	if (mi.charAt(0) == '0') mi = mi.substring(1);
	var today = __TODAY;
	return [y.length == 0 ? today.getFullYear() : parseInt(y), m.length == 0 ? today.getMonth() : parseInt(m) - 1, d.length == 0 ? today.getDate() : parseInt(d), h.length == 0 ? today.getHours() : parseInt(h), mi.length == 0 ? today.getMinutes() : parseInt(mi)];
}

function popCalendar(obj, pattern, allowEmpty, showTime, postBack) {
	dateSel.pattern = pattern;
	dateSel.showTime = showTime;
	if (obj.value.length > 0 && validateDateFormat(obj.value, pattern)) {
		var d = extractDate(obj.value, pattern);
		if (!isValidDate(d[0], d[1], d[2], d[3], d[4])) {
			dateSel.setCurrent();
		} else {
			dateSel.year = d[0];
			dateSel.month = d[1];
			dateSel.date = d[2];
			dateSel.origYear = d[0];
			dateSel.origMonth = d[1];
			dateSel.origDate = d[2];
			if (dateSel.showTime) {
				dateSel.hour = d[3];
				dateSel.minute = d[4];
			}
		}
	} else {
		dateSel.setCurrent();
	}
	dateSel.inputObj = obj;
	dateSel.allowEmpty = allowEmpty;
	dateSel.postBack = postBack;
	dateSel.show(obj);
}

function isValidDate(year, month, day, hour, minute) {
	if (isNaN(year) || isNaN(month) || isNaN(day)) {
		return false;
	}
	if (month < 0 || month > 11) {
        return false;
    }
    if (day < 1 || day > 31) {
        return false;
    }
    if (year > 3000 || year < 1000) {
		return false;
    }
    if ((month == 3 || month == 5 || month == 8 || month == 10) &&
        (day == 31)) {
			return false;
    }
    if (month == 1) {
        var leap = (year % 4 == 0 &&
           (year % 100 != 0 || year % 400 == 0));
        if (day>29 || (day == 29 && !leap)) {
            return false;
        }
    }
    if (hour) {
    	if (hour < 0 && hour > 23) return false;
    }
    if (minute) {
    	if (minute<0 && minute>59) return false;
    }
    return true;
}

function validateDateFormat(value, datePattern) {
	var regStr = datePattern.replace(/y/g,'[0-9]').replace(/MM/g,'((0[1-9])|(1[0-2]))')
		.replace(/M/g,'([1-9]|(1[0-2]))').replace(/dd/g,'((0[1-9])|([1-2][0-9])|(3[0-1]))')
		.replace(/d/g,'([1-9]|([1-2][0-9])|(3[0-1]))')
		.replace(/hh/g,'(([0-1][0-9])|(2[0-3]))').replace(/h/g,'(([1-9])|(1[0-9])|(2[0-3]))')
		.replace(/HH/g,'(([0-1][0-9])|(2[0-3]))').replace(/H/g,'(([1-9])|(1[0-9])|(2[0-3]))')
		.replace(/mm/g,'([0-5][0-9])').replace(/m/g,'(([1-9])|([1-5][0-9]))')
		.replace(/\./g,'\\.');
	var reg = new RegExp('^' + regStr + '$');
	return reg.exec(value) != null;
}
    
function validateDate(value, datePattern, notify) {
	if (value.length == 0) return true;
	var v = validateDateFormat(value, datePattern);
	var d;
	if (v) {
		d = extractDate(value, datePattern);
		var v = isValidDate(d[0], d[1], d[2], d[3], d[4]);
	}
	if (! v && notify) {
		var today = __TODAY;
		alert(msgs['errformat'].replace(/\{0\}/, getDateString(today.getFullYear(), 5, 15, 14, 5, datePattern)));
	}
	return v;
}

function fixDate(obj, pattern) {
	if (obj.tagName == "INPUT" && obj.type == "text") {
		if (! validateDate(obj.value, pattern)) {
			obj.value = "";
		}
	}
}