计算时间差(yyyy--MM--dd)格式

//通过开始时间和结束时间计算请假天数
function count(){

//获得要计算的两个时间
var OneTime=document.getElementById("stateTime").value;
var TwoTime=document.getElementById("EndTime").value;

//截取出时间的年/月/日
var oneday = jiaqiqi.substring(stateTime.length,stateTime.lastIndexOf ('-')+1);//one日
var onemonth=jiaqiqi.substring(5,stateTime.lastIndexOf ('-')); //月
var oneyear=jiaqiqi.substring(0,stateTime.indexOf ('-')); //年

var twoday = jiaqizhi.substring(EndTime.length,EndTime.lastIndexOf ('-')+1); //two日
var twomonth=jiaqizhi.substring(5,EndTime.lastIndexOf ('-')); //月
var twoyear=jiaqizhi.substring(0,EndTime.indexOf ('-')); //年

//
var newtime=((Date.parse(twomonth+'/'+twoday+'/'+twoyear)- Date.parse (onemonth+'/'+oneday+'/'+oneyear))/86400000);

alert(newtime);
}
}