var date1=$("#startDate").val();
var date2=$("#endDate").val();
//alert("daysss "+"sdate "+date1+" edate "+date2)
var a = /^(\d{4})-(\d{2})-(\d{2})$/
if (!a.test(date1)) { //判断选中的日期格式
date1=date1.Format("yyyy-MM-dd");
date2=date2.Format("yyyy-MM-dd");
}
var a=new Date(date2); //结束 addDateD(date2.trim(), 1)
var b=new Date(date1); //开始
var year=a.getFullYear()-b.getFullYear();
var month=a.getMonth()-b.getMonth();
var day=a.getDate()-b.getDate()+1;
var md=parseInt(month) + parseInt(year) * 12;
var mm=a.getMonth();
var d = new Date(year, mm, 0);
var days=d.getDate();
//alert(" "+mm+"月份 本月 "+days+"天"+" 相差 day "+day);
if(day<0){
md=md-1;
var mm=a.getMonth();
var d = new Date(year, mm, 0);
var days=d.getDate();
day=days+day;
}else{
var vmm=a.getMonth()+1;
var vd = new Date(year, vmm, 0);
var days=vd.getDate();
if(day==days){
md=md+1;
day=0;
}
}