计算两个日期相差天数的JS代码

计算两个日期相差的天数，原理：
http://www.timebag.net/123.html

将两个日期转成时间戳格式，然后求出相差秒数，再除60 除60 除24 .
既得出天数！

var startDate = “2010-10-20″;

var endDate  = “2010-10-30″;

var startDate = startDate.split(“-”);

var startDate = new Date(startDate[1],startDate[2],startDate[0],0,0,0,0);

var endDate  = endDate.split(“-”);

var endDate  = new Date(endDate[1],endDate[2],endDate[0],0,0,0,0);

var date  = Math.floor((endDate – startDate)/(1000*24*3600*30));

var startDate = startDate.split(“-”);
var startDate = new Date(startDate[1],startDate[2],startDate[0],0,0,0,0);

var endDate  = endDate.split(“-”);
var endDate  = new Date(endDate[1],endDate[2],endDate[0],0,0,0,0);

var date  = Math.floor((endDate – startDate)/(1000*24*3600*30));