function HS_DateAdd(interval,number,date){

	number = parseInt(number);
	if (typeof(date)=="string"){var date = new Date(date.split("-")[0],date.split("-")[1],date.split("-")[2])}
	if (typeof(date)=="object"){var date = date}
	switch(interval){
		case "y":return new Date(date.getFullYear()+number,date.getMonth(),date.getDate()); break;
		case "m":return new Date(date.getFullYear(),date.getMonth()+number,checkDate(date.getFullYear(),date.getMonth()+number,date.getDate())); break;
		case "d":return new Date(date.getFullYear(),date.getMonth(),date.getDate()+number); break;
		case "w":return new Date(date.getFullYear(),date.getMonth(),7*number+date.getDate()); break;
	}
}

function checkDate(year,month,date){
	var enddate = ["31","28","31","30","31","30","31","31","30","31","30","31"];
	var returnDate = "";
	if (year%4==0){enddate[1]="29"}
	if (date>enddate[month]){returnDate = enddate[month]}else{returnDate = date}

	return returnDate;
}

function WeekDay(date){
	var theDate;
	if (typeof(date)=="string"){theDate = new Date(date.split("-")[0],date.split("-")[1],date.split("-")[2]);}
	if (typeof(date)=="object"){theDate = date}

	return theDate.getDay();
}

function HS_calender(){

	var lis = "";

	var style = "";

	/*可以把下面的css剪切出去独立一个css文件webjx.com*/

	style +="<style type='text/css'>";

	style +=".calender { width:170px; height:auto; font-size:12px; margin-right:14px; background:url(calenderbg.gif) no-repeat right center #fff; border:1px solid #397EAE; padding:1px}";

	style +=".calender ul {list-style-type:none; margin:0; padding:0;}";

	style +=".calender .day { background-color:#EDF5FF; height:20px;}";

	style +=".calender .day li,.calender .date li{ float:left; width:14%; height:20px; line-height:20px; text-align:center}";

	style +=".calender li a { text-decoration:none; font-family:Tahoma; font-size:11px; color:#333}";

	style +=".calender li a:hover { color:#f30; text-decoration:underline}";

	style +=".calender li a.hasArticle {font-weight:bold; color:#f60 !important}";

	style +=".lastMonthDate, .nextMonthDate {color:#bbb;font-size:11px}";

	style +=".selectThisYear a, .selectThisMonth a{text-decoration:none; margin:0 2px; color:#000; font-weight:bold}";

	style +=".calender .LastMonth, .calender .NextMonth{ text-decoration:none; color:#000; font-size:18px; font-weight:bold; line-height:16px;}";

	style +=".calender .LastMonth { float:left;}";

	style +=".calender .NextMonth { float:right;}";

	style +=".calenderBody {clear:both}";

	style +=".calenderTitle {text-align:center;height:20px; line-height:20px; clear:both}";

	style +=".today { background-color:#ffffaa;border:1px solid #f60; padding:2px}";

	style +=".today a { color:#f30; }";

	style +=".calenderBottom {clear:both; border-top:1px solid #ddd; padding: 3px 0; text-align:left}";

	style +=".calenderBottom a {text-decoration:none; margin:2px !important; font-weight:bold; color:#000}";

	style +=".calenderBottom a.closeCalender{float:left}";

	style +=".closeCalenderBox {float:right; border:1px solid #000; background:#fff; font-size:9px; width:11px; height:11px; line-height:11px; text-align:center;overflow:hidden; font-weight:normal !important}";

	style +="</style>";



	var now;

	if (typeof(arguments[0])=="string"){

		selectDate = arguments[0].split("-");

		var year = selectDate[0];

		var month = parseInt(selectDate[1])-1+"";

		var date = selectDate[2];

		now = new Date(year,month,date);

	}else if (typeof(arguments[0])=="object"){

		now = arguments[0];

	}

	var lastMonthEndDate = HS_DateAdd("d","-1",now.getFullYear()+"-"+now.getMonth()+"-01").getDate();

	var lastMonthDate = WeekDay(now.getFullYear()+"-"+now.getMonth()+"-01");

	var thisMonthLastDate = HS_DateAdd("d","-1",now.getFullYear()+"-"+(parseInt(now.getMonth())+1).toString()+"-01");

	var thisMonthEndDate = thisMonthLastDate.getDate();

	var thisMonthEndDay = thisMonthLastDate.getDay();

	var todayObj = new Date();

	today = todayObj.getFullYear()+"-"+todayObj.getMonth()+"-"+todayObj.getDate();

	

	for (i=0; i<lastMonthDate; i++){  // Last Month's Date

		lis = "<li class='lastMonthDate'>"+lastMonthEndDate+"</li>" + lis;

		lastMonthEndDate--;

	}

	for (i=1; i<=thisMonthEndDate; i++){ // Current Month's Date

// James testing .......

			var pendMonth0;

			if (parseInt(now.getMonth())+1 <=9){

				pendMonth0 = new String("0");

			}else{

				pendMonth0 = new String("");

			}

			var pendDay0;

			if (i <=9){

				pendDay0 = new String("0");

			}else{

				pendDay0 = new String("");

			}

		if(today == now.getFullYear()+"-"+now.getMonth()+"-"+i){

			var todayString = now.getFullYear()+"-"+(parseInt(now.getMonth())+1).toString()+"-"+i;			

			lis += "<li><a href=javascript:void(0) class='today' onclick='_selectThisDay(this)' title='"+pendMonth0+(parseInt(now.getMonth())+1)+"/"+pendDay0+i+"/"+now.getFullYear()+"'>"+i+"</a></li>";

		}else{



			lis += "<li><a href=javascript:void(0) onclick='_selectThisDay(this)' title='"+pendMonth0+(parseInt(now.getMonth())+1)+"/"+pendDay0+i+"/"+now.getFullYear()+"'>"+i+"</a></li>";

		}

		

	}

	var j=1;

	for (i=thisMonthEndDay; i<6; i++){  // Next Month's Date

		lis += "<li class='nextMonthDate'>"+j+"</li>";

		j++;

	}

	lis += style;



	var CalenderTitle = "<a href='javascript:void(0)' class='NextMonth' onclick=HS_calender(HS_DateAdd('m',1,'"+now.getFullYear()+"-"+now.getMonth()+"-"+now.getDate()+"'),this) title='Next Month'>&raquo;</a>";

	CalenderTitle += "<a href='javascript:void(0)' class='LastMonth' onclick=HS_calender(HS_DateAdd('m',-1,'"+now.getFullYear()+"-"+now.getMonth()+"-"+now.getDate()+"'),this) title='Previous Month'>&laquo;</a>";

	CalenderTitle += "<span class='selectThisYear'><a href='javascript:void(0)' onclick='CalenderselectYear(this)' title='Click here to select other year' >"+now.getFullYear()+"</a></span>年<span class='selectThisMonth'><a href='javascript:void(0)' onclick='CalenderselectMonth(this)' title='Click here to select other month'>"+(parseInt(now.getMonth())+1).toString()+"</a></span>月"; 



	if (arguments.length>1){

		arguments[1].parentNode.parentNode.getElementsByTagName("ul")[1].innerHTML = lis;

		arguments[1].parentNode.innerHTML = CalenderTitle;



	}else{

		var CalenderBox = style+"<div class='calender'><div class='calenderTitle'>"+CalenderTitle+"</div><div class='calenderBody'><ul class='day'><li>日</li><li>一</li><li>二</li><li>三</li><li>四</li><li>五</li><li>六</li></ul><ul class='date' id='thisMonthDate'>"+lis+"</ul></div><div class='calenderBottom'><a href='javascript:void(0)' class='closeCalender' onclick='closeCalender(this)'>&times;</a></div></div>";

		return CalenderBox;

	}

}

function _selectThisDay(d){

	var boxObj = d.parentNode.parentNode.parentNode.parentNode.parentNode;

		boxObj.targetObj.value = d.title;

		boxObj.parentNode.removeChild(boxObj);

}

function closeCalender(d){

	var boxObj = d.parentNode.parentNode.parentNode;

		boxObj.parentNode.removeChild(boxObj);

}



function CalenderselectYear(obj){

		var opt = "";

		var thisYear = obj.innerHTML;

		for (i=1970; i<=2020; i++){

			if (i==thisYear){

				opt += "<option value="+i+" selected>"+i+"</option>";

			}else{

				opt += "<option value="+i+">"+i+"</option>";

			}

		}

		opt = "<select onblur='selectThisYear(this)' onchange='selectThisYear(this)' style='font-size:11px'>"+opt+"</select>";

		obj.parentNode.innerHTML = opt;

}



function selectThisYear(obj){

	HS_calender(obj.value+"-"+obj.parentNode.parentNode.getElementsByTagName("span")[1].getElementsByTagName("a")[0].innerHTML+"-1",obj.parentNode);

}



function CalenderselectMonth(obj){

		var opt = "";

		var thisMonth = obj.innerHTML;

		for (i=1; i<=12; i++){

			if (i==thisMonth){

				opt += "<option value="+i+" selected>"+i+"</option>";

			}else{

				opt += "<option value="+i+">"+i+"</option>";

			}

		}

		opt = "<select onblur='selectThisMonth(this)' onchange='selectThisMonth(this)' style='font-size:11px'>"+opt+"</select>";

		obj.parentNode.innerHTML = opt;

}

function selectThisMonth(obj){

	HS_calender(obj.parentNode.parentNode.getElementsByTagName("span")[0].getElementsByTagName("a")[0].innerHTML+"-"+obj.value+"-1",obj.parentNode);

}

function HS_setDate(inputObj){

	var calenderObj = document.createElement("span");

	calenderObj.innerHTML = HS_calender(new Date());

	calenderObj.style.position = "absolute";

	calenderObj.targetObj = inputObj;

	inputObj.parentNode.insertBefore(calenderObj,inputObj.nextSibling);

}



/**

 *  Only allow choose one checkbox from IDN and Number

 */



function validate(chkNew, chkOld){

  if (chkNew.checked == 1 && chkOld.checked == 1){

    alert("请在IDN和数字中选择一项做搜寻");

	chkOld.checked = false;

  }

}



/**

 *  Declaring valid date character, minimum year and maximum year

 */



var dtCh= "/";

var minYear=1900;

var maxYear=2100;



function isInteger(s){

	var i;

    for (i = 0; i < s.length; i++){   

        // Check that current character is number.

        var c = s.charAt(i);

        if (((c < "0") || (c > "9"))) return false;

    }

    // All characters are numbers.

    return true;

}



function stripCharsInBag(s, bag){

	var i;

    var returnString = "";

    // Search through string's characters one by one.

    // If character is not in bag, append to returnString.

    for (i = 0; i < s.length; i++){   

        var c = s.charAt(i);

        if (bag.indexOf(c) == -1) returnString += c;

    }

    return returnString;

}



function daysInFebruary (year){

	// February has 29 days in any year evenly divisible by four,

    // EXCEPT for centurial years which are not also divisible by 400.

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

}

function DaysArray(n) {

	for (var i = 1; i <= n; i++) {

		this[i] = 31

		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}

		if (i==2) {this[i] = 29}

   } 

   return this

}



function isDate(dtStr){

	var daysInMonth = DaysArray(12)

	var pos1=dtStr.indexOf(dtCh)

	var pos2=dtStr.indexOf(dtCh,pos1+1)

	var strMonth=dtStr.substring(0,pos1)

	var strDay=dtStr.substring(pos1+1,pos2)

	var strYear=dtStr.substring(pos2+1)

	strYr=strYear

	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)

	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)

	for (var i = 1; i <= 3; i++) {

		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)

	}

	month=parseInt(strMonth)

	day=parseInt(strDay)

	year=parseInt(strYr)

	if (pos1==-1 || pos2==-1){

		alert("	请输入正确日期格式: mm/dd/yyyy")

		//alert("The date format should be : mm/dd/yyyy")

		return false

	}

	if (strMonth.length<1 || month<1 || month>12){

		alert("请输入正确月份")

		//alert("Please enter a valid month")

		return false

	}

	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){

		alert("请输入正确日期")

		//alert("Please enter a valid day")

		return false

	}

	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){

		alert("请输入正确年份 - "+minYear+" 到 "+maxYear)

		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)

		return false

	}

	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){

		alert("请输入正确日期")

		//alert("Please enter a valid date")

		return false

	}

return true

}



function ValidateForm(){

	var dt=document.searchform.date;

	var dmin=document.searchform.min;

	var dmax=document.searchform.max;

	

	if(dt.value!=''){

		if (isDate(dt.value)==false){

			dt.focus();

			return false;

		}

	}

	if (isInteger(dmin.value)==false){

		dmin.focus();

		alert("嗯...最少字数输入值不对哦！");

		return false;

	}

	if (isInteger(dmax.value)==false){

		dmax.focus();

		alert("嗯...最多字数输入值不对哦！");

		return false;

	}

	

	if (dmin.value > dmax.value){

		if(dmax.value!=''){

			alert("哦噢...最小值超过最大值了");

			dmin.focus();

			return false;

		}

	}

    return true;
}