//四创js
/*
===========================================
//得到日期年月日等加数字后的日期
===========================================
*/
Date.prototype.dateAdd = function(interval,number)
{
	var date = this;

    switch(interval)
    {
        case "y" : 
            date.setFullYear(date.getFullYear()+number);
            return date;

        case "q" : 
            date.setMonth(date.getMonth()+number*3);
            return date;

        case "m" : 
            date.setMonth(date.getMonth()+number);
            return date;

        case "w" : 
            date.setDate(date.getDate()+number*7);
            return date;
        
        case "d" : 
            date.setDate(date.getDate()+number);
            return date;

        case "h" : 
			date.setTime(date.getTime()+number*60*60*1000);
            return date;
		case "m" : 
            date.setMinutes(date.getMinutes()+number);
            return date;

		case "s" : 
            date.setSeconds(date.getSeconds()+number);
            return date;

        default : 
            date.setDate(d.getDate()+number);
            return date;
	}
}
/*用相对不规则的字符串来创建日期对象,不规则的含义为:顺序包含年月日三个数值串,有间隔*/
String.prototype.createDate = function(){
var sDate=this.replace(/(^\s+|\s+$)/g,'');
if(sDate!='')
{
	var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'');
	var t=new Date(sDate.replace(/\-/g,'/')); 
	return t;
}
else
{
	return new Date();
}
}
function Date2String(dt){
return dt.getFullYear()+"-"+(dt.getMonth()+1)+"-"+dt.getDate()+" "+dt.getHours()+":"+dt.getMinutes()+":"+dt.getSeconds();
}

function PIsNumber(string,sign) 
{ 
	var number; 
	if (string==null) return false; 
	if ((sign!=null) && (sign!='-') && (sign!='+')) 
	{ 
		alert('IsNumber(string,sign)的参数出错： sign为null或"-"或"+"'); 
		return false; 
	} 
	number = new Number(string); 
	if (isNaN(number)) 
	{ 
		return false; 
	} 
	else if ((sign==null) || (sign=='-' && number<0) || (sign=='+' && number>0)) 
	{ 
		return true; 
	} 
	else
		return false; 
}
//数据的四舍五入
function  ForDight(Dight,How)
{  
    Dight  =  Math.round (Dight*Math.pow(10,How))/Math.pow(10,How);  
    return  Dight;  
} 
function GetUrlQueryString(key)
{
	var returnValue =""; 
	var sURL = window.document.URL;
	if (sURL.indexOf("?") > 0)
	{
		var arrayParams = sURL.split("?");
		var arrayURLParams = arrayParams[1].split("&");
		for (var i = 0; i < arrayURLParams.length; i++)
		{
			var sParam =  arrayURLParams[i].split("=");

			if ((sParam[0] ==key) && (sParam[1] != ""))
				returnValue=sParam[1];
		}
	}
	return returnValue;
}
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