开始日期  
  		结束日期

function startTimeFocus() {
	return WdatePicker({
		skin : 'whyGreen',
		minDate:'#F{$dp.$D('endTime',{d:-30});}',
		maxDate : '#F{$dp.$D('endTime')||'%y-%M-%d'}',
		doubleCalendar:true,
		dateFmt:'yyyy-MM-dd'
	});
}

function endTimeFocus() {
	return WdatePicker({
		skin : 'whyGreen',
		minDate:'#F{$dp.$D('startTime')}',
		maxDate : '#F{$dp.$D('startTime',{d:30})||'%y-%M-%d'}',
		doubleCalendar:true, 
		dateFmt:'yyyy-MM-dd'
	});
}

function endTimeFocus() {
	return WdatePicker({
		skin : 'whyGreen',
		minDate:'#F{$dp.$D('startTime')}',
		//maxDate : '#F{$dp.$D('startTime',{d:30})||'%y-%M-%d'}',
		maxDate:getMaxDate(),
		doubleCalendar:true, 
		dateFmt:'yyyy-MM-dd'
	});
}
//获得最大时间
function getMaxDate(){
	var clock=currentTime();  
    var dt;  
    var times=0;  
    dt=$("#startTime").val();  
    if(dt!=''){  
        times =Date.parse(dt.replace(/-/g,'/'))+30*24*60*60*1000;//时间间隔为30天  
      
        if(times-Date.parse(clock.replace(/-/g,'/'))

	
	
	
	
	




	
My97DatePicker代码演示

	
		
1.两日期时间相差30天，不超过当前日期，控件Picker1
		开始时间：
		结束时间：
	


	
		
1.两日期时间相差15天，不超过当前日期,控件Picker1
		开始时间：
		结束时间：
	

	
		var picker1 = new Picker1("datepicker1","datepicker2",30);
		picker1.init();
		var picker2 = new Picker1("datepicker3","datepicker4",15);
		picker2.init();
	

/**
* author:ls
* email:liusaint@gmail.com
* date:2016年1月2日
*/

//IE9以下不能使用bind的处理。
if (!Function.prototype.bind) { 
	Function.prototype.bind = function (oThis) { 
		if (typeof this !== "function") { 
			throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable"); 
		} 
		var aArgs = Array.prototype.slice.call(arguments, 1), 
		fToBind = this, 
		fNOP = function () {}, 
		fBound = function () { 
			return fToBind.apply(this instanceof fNOP && oThis ? this: oThis, 
				aArgs.concat(Array.prototype.slice.call(arguments))); 
		}; 
		fNOP.prototype = this.prototype; 
		fBound.prototype = new fNOP(); 
		return fBound; 
	}; 
}

function Picker1(startEle,endEle,day){
	this.md = new Date();
	this.startEle = startEle;
	this.endEle = endEle;
	this.day = -day;
}

Picker1.prototype = {
	init:function(){
		//初始化控件。给开始日期输入框和结束的输入框绑定事件。传入合理的参数。注意this。
		var that = this;
		document.getElementById(this.startEle).onfocus = function(){
			that.picker1rule(this);
		}
		document.getElementById(this.endEle).onfocus = function(){
			that.picker2rule(this);
		}
	},
	picker1rule:function(ele){
		//开始日期的输入框的规则

		var pickedfunBind = this.pickedFunc.bind(ele,this);
		var onclearedBind = this.clearedFun.bind({},this);

		WdatePicker({maxDate:'#F{$dp.$D(''+this.endEle+'')||'new Date()'}',minDate:'#F{$dp.$D(''+this.endEle+'',{d:'+this.day+'})}',onpicked:pickedfunBind,oncleared:onclearedBind})
	},
	picker2rule:function(ele){
		// console.log(this.md,this,"in picker2rule");
		WdatePicker({el:ele,minDate:'#F{$dp.$D(''+this.startEle+'')}',maxDate:this.md})
	},
	pickedFunc:function(that){
		//开始日期的输入框的规则，onpicked时候的动作
		var Y=$dp.cal.getP('y');
		var M=$dp.cal.getP('M');
		var D=$dp.cal.getP('d');

		// var choosedDateArr = document.getElementById(that.startEle).value.split("-");
		// var Y=choosedDateArr[0];
		// var M=choosedDateArr[1];
		// var D=choosedDateArr[2];

		M=parseInt(M,10)-1;
		D=parseInt(D,10) - that.day;　//超过30天，也能自动处理。
		var d = new Date()
		d.setFullYear(Y,M,D) //设置时间

		var nowDate=new Date();　
		//跟现在的时间比较，如果算出来的值大于现在时间，修改全局变量md为现在时间。否则为算出来的时间。
		if(nowDate