js将时间格式Wed May 25 13:55:10 CST 2016转换为2016-5-25格式再得到7天后的时间

<script>
$(function(){
var a=$("#endTime").val();
var c=todate(a, "-", true);
var d=fun_submit(c);
var newEndTime = $('#newEndTime');
newEndTime.append(d+"前");
})
//将时间转换
function todate(inputstr, showsplit, showweek) {
debugger;
//Wed Mar 22 13:38:37 CST 2017
inputstr = inputstr + ""; //末尾加一个空格
var date = "";
var month = new Array();
var week = new Array();
month["Jan"] = 1; month["Feb"] = 2; month["Mar"] = 3; month["Apr"] = 4; month["May"] = 5; month["Jan"] = 6;
month["Jul"] = 7; month["Aug"] = 8; month["Sep"] = 9; month["Oct"] = 10; month["Nov"] = 11; month["Dec"] = 12;
week["Mon"] = "一"; week["Tue"] = "二"; week["Wed"] = "三"; week["Thu"] = "四"; week["Fri"] = "五"; week["Sat"] = "六"; week["Sun"] = "日";
str = inputstr.split(" ");
date = str[5];
var dateArray=new Array();
dateArray[0]=7;

debugger;
date +=+showsplit +month[str[1]]+showsplit+ str[2]+dateArray[0];
/*if(showweek){
date += "    " +"（"+ " 星期" + week[str[0]]+"）";
}*/
return date;
}
//获取后7天的日期
function fun_submit(arg){
var date1 = new Date(arg);
var date2 = new Date(date1);
date2.setDate(date1.getDate()+7);
var times = date2.getFullYear()+"年 "+(date2.getMonth()+1)+"月 "+date2.getDate()+"号";
return times;
}

</script>