compare date

var date1 = new Date('2013/04/02 18:00')
var date2 = new Date('2013/04/02 19:22:21')
 
var s1 = date1.getTime(),s2 = date2.getTime();
var total = (s2 - s1)/1000;
 
var day = parseInt(total / (24*60*60));//计算整数天数
var afterDay = total - day*24*60*60;//取得算出天数后剩余的秒数
var hour = parseInt(afterDay/(60*60));//计算整数小时数
var afterHour = total - day*24*60*60 - hour*60*60;//取得算出小时数后剩余的秒数
var min = parseInt(afterHour/60);//计算整数分
var afterMin = total - day*24*60*60 - hour*60*60 - min*60;//取得算出分后剩余的秒数