function $(s){return document.getElementById(s);}
//check email
function checkEmail(fieldName){
	//var patrn=/^((\w)|[-]|[.])+@(((\w)|[-])+[.])+[a-z]{2,4}$/;
	var patrn=/^(([\-\w]+)\.?)+@(([\-\w]+)\.?)+\.[a-zA-Z]{2,4}$/
	if (!patrn.exec(fieldName)) return false;
	return true;
}
//checd password
	function checkPassword(fieldName){
		if(isNull(fieldName)) return "密码不能为空!";
		var returnStr="";
		if(fieldName.length<6){
			returnStr+="密码不得少于6位!";
			return returnStr;
		}
		return "ok";
		var flag=0;
		var  patrn=/[^a-zA-Z0-9]/;
		if(patrn.test(fieldName)){
			returnStr+="密码只能有字母数字组成!";
			//return false;
		}
		patrn=/\d/;
		if(patrn.test(fieldName)){
			flag++;
		}
		patrn=/[a-zA-Z]/;
		if(patrn.test(fieldName)){
			flag++;
		}
		if(flag<2){
			returnStr+="密码必须是字母和数字的组合！";
			//return false;
		}
		
		patrn=/123456|abcdef|654321|fedcba|987654|456789|aaaaaa|bbbbbb|cccccc|dddddd|eeeeee|ffffff|gggggg|hhhhhh|iiiiii|jjjjjj|kkkkkk|llllll|mmmmmm|nnnnnn|oooooo|pppppp|qqqqqq|rrrrrr|ssssss|tttttt|uuuuuu|vvvvvv|wwwwww|xxxxxx|yyyyyy|zzzzzz|000000|111111|222222|333333|444444|555555|666666|777777|888888|999999/i;
		if(patrn.test(fieldName)){
			returnStr+="你的密码有些简单!";
			//return false;
		}
		if(returnStr==""){
			return "ok";
		}else{
			return returnStr;
		}
		//return true;
	}
	function Os(){}
Os.Ie = 1;
Os.Firefox=2;
//
function getOs()
{
   if(navigator.userAgent.indexOf("MSIE")>0)return 1;//ie
   if(isFirefox=navigator.userAgent.indexOf("Firefox")>0)return 2;//firefox
   if(isSafari=navigator.userAgent.indexOf("Safari")>0)return 3;  
   if(isCamino=navigator.userAgent.indexOf("Camino")>0)return 4;
   if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0)return 5;
   return 0;
}
function $(s)
{
	return document.getElementById(s);
}
//function $f(a,b){return a.getElementsByTagName(b)[0].text;}
//function $f(a,b){return a.getElementsByTagName(b)[0].firstChild.nodeValue;}
function $f(a,b){
	var osType = getOs();
	if(osType==Os.Ie){
		return a.getElementsByTagName(b)[0].text;
	}else if(osType==Os.Firefox){
		return a.getElementsByTagName(b)[0].firstChild.nodeValue;
	}
}

String.prototype.trim = function(){return this.replace(/(^[ |　]*)|([ |　]*$)/g, "");}
String.prototype.getLength = function(){
	var tmp = this.trim();
	if(!tmp)
		return 0;
	if(!tmp.length)
		return 0;
	if(tmp.length==0)
		return 0;
	var t = 0;
	for(var i=0;i < tmp.length;i++)
	{
		if(tmp.charCodeAt(i)>255)
			t = t+2;
		else
			t = t+1;
	}
	return t;
}
var Utils = new Object();
Utils.htmlDecode = function(text,br,sp) {
	var txt = text.replace(/&gt;/g, '>').replace(/&lt;/g, '<').replace(/&amp;/g, '&');
	//replace(/'/g, '&apos;').replace(/"/g, '&quot;').
	if (br)	txt = txt.replace(/<br>/g, '\n');
	if (sp)	txt = txt.replace(/&nbsp;/g, ' ');;
	return txt;
}
function getClientTop(obj){
	if(obj.tagName.toLowerCase()=="body")
		return 0;
	return obj.offsetTop-obj.scrollTop+ getClientTop(obj.offsetParent);
}
function getClientLeft(obj){
	if(obj.tagName.toLowerCase()=="body")
		return 0;
	return obj.offsetLeft-obj.scrollLeft+getClientLeft(obj.offsetParent);
}
function populate_days(yearValue,Monthvalue,day){
		var days;
		//var year = new Date().getFullYear();
		var year = yearValue;
		if((year%4==0&&year%100!=0)||year%400==0)
			days = new Array(31,29,31,30,31,30,31,31,30,31,30,31);
		else
			days = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
		//var day;
		//var Month;
		var length1 = day.options.length;
		var length2 = days[eval(Monthvalue-1)];//alert(length1+'  '+length2);
		//如果下拉单中的天数比应该的天数少
		if(length1<length2){
			for(i=length1;i<length2;i++){
				day.options[i] = new Option(i+1,i+1);
			}
		}else{
			var dif = length1-length2;
			for(i=length1-1;i>=length2;i--){
				day.options[i] = null;
			}
		}
	}