jquery 计算两个日期之间的相差天数 ，获取当前时间

最简单的方法使用DateDiff()，判断在两个日期之间存在的指定时间间隔的数目，但是Safari不识别

$(function(){
    var beginTime="2015-08-20";
    var endTime="2015-12-11";
    var days=DateDiff(beginTime,endTime) 
    alert(days)  
})

第二种方法：

var beginTime="2015-08-20";
var endTime="2015-12-11";
var aDate, oDate1, oDate2, days; 
aDate = beginTime.split("-"); 
oDate1 = new Date(aDate[0], aDate[1], aDate[2]); 
aDate = endTime.split("-"); 
oDate2 = new Date(aDate[0] , aDate[1] , aDate[2]); 
days = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 / 24);

 获取当前时间

function addZero(obj) {
        if (obj < 10) return "0" + obj; else return obj
    }
    var currentDate = function () {
        var mydate = new Date();
        var curr_year = mydate.getFullYear();
        var curr_month = mydate.getMonth() + 1;
        var curr_day = mydate.getDate();
        var curr_H = mydate.getHours();
        var curr_M = mydate.getMinutes();
        var curr_S = mydate.getSeconds();
        var monthDate = curr_year + "-" + addZero(curr_month) + "-" + addZero(curr_day) + " " +addZero(curr_H)+":"+addZero(curr_M)+":"+addZero(curr_S);
        return monthDate;
    }
    $("#dataTime").val(currentDate());