Js时间间隔计算函数求间隔天数

function Getdatediff(startDate,endDate)
{
    var startTime = new Date(Date.parse(startDate.replace(/-/g, "/"))).getTime();
    var endTime = new Date(Date.parse(endDate.replace(/-/g, "/"))).getTime();
    var dates = Math.abs((startTime - endTime))/(1000*60*60*24);
    return dates;
}