// 日期选择

// By Ziyue(http://www.web-v.com/)

var months = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"); 

var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); 

var days = new Array("S","M", "T", "W", "T", "F", "S"); 

var today; 

var inputbox;



document.writeln("<div id='Calendar' style='position:absolute; z-index:99; visibility: hidden;'></div>");



function getDays(month, year)

{ 

    //下面的这段代码是判断当前是否是闰年的 

    if (1 == month) 

        return ((0 == year % 4) && (0 != (year % 100))) || (0 == year % 400) ? 29 : 28; 

    else 

        return daysInMonth[month]; 

} 



function getToday() 

{ 

    //得到今天的年,月,日 

    this.now = new Date(); 

    this.year = this.now.getFullYear(); 

    this.month = this.now.getMonth(); 

    this.day = this.now.getDate(); 

}



function getStringDay(str) 

{ 

    //得到输入框的年,月,日

    var str=str.split("/")

    this.now = new Date(parseFloat(str[2]),parseFloat(str[0])-1,parseFloat(str[1])); 

    this.year = this.now.getFullYear(); 

    this.month = this.now.getMonth(); 

    this.day = this.now.getDate(); 

}



//problem

function newCalendar() { 

    var parseYear = parseInt(document.getElementById('Year').options[document.getElementById('Year').selectedIndex].value); 

	var newCal = new Date(parseYear, document.getElementById('Month').selectedIndex, 1); 

    var day = -1; 

    var startDay = newCal.getDay(); 

    var daily = 0; 



	var _toDayThis = new Date();
	
	if (window.opera)
		var strToday = new Date(_toDayThis.getYear()+1900, _toDayThis.getMonth(), _toDayThis.getDate());
	else if (document.all)
		var strToday = new Date(_toDayThis.getYear(), _toDayThis.getMonth(), _toDayThis.getDate());


	else
		var strToday = new Date(_toDayThis.getYear()+1900, _toDayThis.getMonth(), _toDayThis.getDate());

    if ((today.year == newCal.getFullYear()) &&(today.month == newCal.getMonth())) 

        day = today.day; 

    

    var tableCal = document.getElementById('calendar_tbl'); 

    var intDaysInMonth =getDays(newCal.getMonth(), newCal.getFullYear());

    //alert(tableCal.tagName);

    for (var intWeek = 1; intWeek < tableCal.rows.length;intWeek++) 

        for (var intDay = 0;intDay < tableCal.rows[intWeek].cells.length;intDay++) 

        { 

            var cell = tableCal.rows[intWeek].cells[intDay]; 

            if ((intDay == startDay) && (0 == daily)) 

                daily = 1; 

          

			bcando = true;

			cell.style.color='#215DC6';



            if(day==daily) //今天，调用今天的Class 

            {

                cell.style.background='#6699CC';

                cell.style.color='#FFFFFF';

                //cell.style.fontWeight='bold';

            }

            else if(intDay==6) //周六 

                cell.style.color='green'; 

            else if (intDay==0) //周日 

                cell.style.color='red';



			showDate = new Date(parseYear, document.getElementById('Month').selectedIndex, daily);

			//alert(showDate +"||"+ strToday)

			if (showDate < strToday)

			{

				//alert(showDate+"||"+strToday);
				bcando = false;

				cell.style.color='#C8C8C8';

			}



            if ((daily > 0) && (daily <= intDaysInMonth)) 

            { 
                cell.innerHTML = daily;

				cell.onClick="javascript:alert('1')";



				if (bcando)

					cell.innerHTML = "<a href=\"#\" onclick=\"GetDate('"+(parseInt(document.getElementById('Month').selectedIndex)+1)+"/"+daily+"/"+parseYear+"')\"><font color='"+cell.style.color+"'>"+daily+"</font></a>";

                else

					cell.innerHTML = daily;



				daily++; 

            } 

            else 

                cell.innerHTML = ""; 

        }

} 



function GetDate(InputBox)

{ 

	var sp = InputBox.split("/");



	s_year = sp[2];

	s_month = sp[0];

	s_day = sp[1];



	if (s_month.length == 1)

		s_month = "0"+s_month;



	if (s_day.length == 1)

		s_day = "0"+s_day;



	sDate = s_month + "/" + s_day + "/" + s_year;

	inputbox.value = sDate;

	HiddenCalendar();	

	/*

	alert(InputBox);

	var sDate; 

    //这段代码处理鼠标点击的情况 

    if (event.srcElement.tagName == "TD")

	{

        if (event.srcElement.innerText != "") 

        {

			month = document.all.Month.value;

			day = event.srcElement.innerText;



			selDate = new Date(document.all.Year.value, month - 1, day);

			toDayThis = new Date();

			toDayThis_1 = new Date(toDayThis.getYear(), toDayThis.getMonth(), toDayThis.getDate());

			if (selDate < toDayThis_1)

			{

				return;

			}



			if (month.length == 1) month = "0"+month;

			if (day.length == 1) day = "0"+day;

			sDate = month + "/" + day + "/" + document.all.Year.value;

            eval("document.all."+InputBox).value=sDate;

            HiddenCalendar();

        }

	}

	*/

} 



function HiddenCalendar()

{

    //关闭选择窗口

    document.getElementById('Calendar').style.visibility='hidden';

}



function ShowCalendar(InputBox)

{

    var x,y,intLoop,intWeeks,intDays;

    var DivContent;

    var year,month,day;

    //var o=eval("document.all."+InputBox);

    var o = InputBox;

	var thisyear; //真正的今年年份

	inputbox = o;

    

    thisyear=new getToday();

    thisyear=thisyear.year;   

    today = o.value;

    if(isDate(today))

	{

		if (InputBox.name == "dodate" && document.getElementById('pudate').value != "" && InputBox.value != "")
		{
			var _d1 = document.getElementById('pudate').value.split("/");
			var _d2 = InputBox.value.split("/");

			if (_d1[0] != _d2[0])
			{
				var _sdate = _d1[0]+"/"+_d2[1]+"/"+_d2[2];
				today = new getStringDay(_sdate);
			}
			else
				today = new getStringDay(today);

		}
		else
			today = new getStringDay(today);

	}

    else

        today = new getToday(); 

    

    //显示的位置

    x=o.offsetLeft;

    y=o.offsetTop;

    while(o=o.offsetParent)

    {

        x+=o.offsetLeft;

        y+=o.offsetTop;

    }


    document.getElementById('Calendar').style.left=x+2 + 'px';

    document.getElementById('Calendar').style.top=y+20 + 'px';

    document.getElementById('Calendar').style.visibility="visible";

    

    //下面开始输出日历表格(border-color:#9DBAF7)

    DivContent="<table id='caltab' cellspacing='0' style='border:1px solid #0066FF; background-color:#EDF2FC'>";

    DivContent+="<tr>";

    DivContent+="<td style='border-bottom:1px solid #0066FF; background-color:#C7D8FA'>";



    //年

    DivContent+="<select name='Year' id='Year' onChange='newCalendar()' style='font-family:Verdana; font-size:12px'>";

    for (intLoop = thisyear; intLoop < (thisyear + 2); intLoop++) 

        DivContent+="<option value= " + intLoop + " " + (today.year == intLoop ? "Selected" : "") + ">" + intLoop + "</option>"; 

    DivContent+="</select>";

    

    //月

    DivContent+="<select name='Month' id='Month' onChange='newCalendar()' style='font-family:Verdana; font-size:12px'>";

    for (intLoop = 0; intLoop < months.length; intLoop++) 

        DivContent+="<option value= " + (intLoop + 1) + " " + (today.month == intLoop ? "Selected" : "") + ">" + months[intLoop] + "</option>"; 

    DivContent+="</select>";

    

    DivContent+="</td>";

    

    DivContent+="<td style='border-bottom:1px solid #0066FF; background-color:#C7D8FA; font-weight:bold; font-family:Wingdings 2,Wingdings,Webdings; font-size:16px; padding-top:2px; color:#4477FF; cursor:hand' align='center' title='close' onclick='HiddenCalendar()'><img src='./images/main/x.gif' border='0'></td>";

    DivContent+="</tr>";

     

    DivContent+="<tr><td align='center' colspan='2'>";

    DivContent+="<table id='calendar_tbl' border='0' width='100%'>";

   

    //星期

    DivContent+="<tr>";

    for (intLoop = 0; intLoop < days.length; intLoop++) 

        DivContent+="<td align='center' style='font-size:12px'>" + days[intLoop] + "</td>"; 

    DivContent+="</tr>";





    //天

    for (intWeeks = 0; intWeeks < 6; intWeeks++)

    {

        DivContent+="<tr>"; 

        for (intDays = 0; intDays < days.length; intDays++)

		{

            DivContent+="<td style='cursor:hand; border-right:1px solid #BBBBBB; border-bottom:1px solid #BBBBBB; color:#215DC6; font-family:Verdana; font-size:12px' align='center'></td>"; 

			//onclick='GetDate(\"" + InputBox + "\")' 

		}

		DivContent+="</tr>"; 

    } 



	//alert(DivContent);

    DivContent+="</table></td></tr></table>";

	DivContent+="<iframe src='#' style='position:absolute; top:0px; left:0px; width:153px; height:146px; z-index:-1; filter:alpha(opacity=0);'></iframe>";

	//alert(DivContent);

	//alert(document.all.Calendar);

	document.getElementById('Calendar').innerHTML=DivContent;

    //document.all.Calendar.innerHTML=DivContent;

    newCalendar();

}



function isDate(dateStr)

{ 

    //var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;

    var datePat = /^(\d{1,2})(\/)(\d{1,2})(\/)(\d{4})$/;

	var matchArray = dateStr.match(datePat);

    if (matchArray == null) return false; 

    var month = parseInt(matchArray[1], 10);

    var day = parseInt(matchArray[3], 10); 

    var year = parseInt(matchArray[5]); 



    if (month < 1 || month > 12) return false; 

    if (day < 1 || day > 31) return false; 

    if ((month==4 || month==6 || month==9 || month==11) && day==31) return false; 

    if (month == 2)

    {

        var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); 

        if (day > 29 || (day==29 && !isleap)) return false; 

    } 

    return true;

}



function ChangeMonth(nMonth, objDay)

{

	if (nMonth == -1)

	{

		objDay.disabled = true;

		objDay.value = -1;

	}

	else

	{

		objDay.disabled = false;

	}

}