//定義正則表達式，因為jS對只能替換一個
//轉換為 "2000/01/01"
var regS = new RegExp("-","gi");
var date1=document.getElementById("begindate");
var date2=document.getElementById("enddate");
date1=date1.replace(regS,"/");

date2=date2.replace(regS,"/");
var bd =new Date(Date.parse(date1));
var ed =new Date(Date.parse(date2));