JS时间（日期）比较或相减(暂时停用)

注：此文均来自网上，可行，只供参考

//JAVASCRIPT中日期相减很麻烦 ,现在有现成的实现方法,拷贝过去就可以用了,方便

//调用该方法(主方法)
function dateDiff(date1, date2){
    var type1 = typeof date1, type2 = typeof date2;
    if(type1 == 'string')
    date1 = stringToTime(date1);
    else if(date1.getTime)
    date1 = date1.getTime();
    if(type2 == 'string')
    date2 = stringToTime(date2);
    else if(date2.getTime)
    date2 = date2.getTime();
    return (date1 - date2) / 1000;//结果是秒
}

//字符串转成Time(dateDiff)所需方法
function stringToTime(string){
    var f = string.split(' ', 2);
    var d = (f[0] ? f[0] : '').split('-', 3);
    var t = (f[1] ? f[1] : '').split(':', 3);
    return (new Date(
    parseInt(d[0], 10) || null,
    (parseInt(d[1], 10) || 1)-1,
    parseInt(d[2], 10) || null,
    parseInt(t[0], 10) || null,
    parseInt(t[1], 10) || null,
    parseInt(t[2], 10) || null
    )).getTime();

}

//调用 dateDiff("2009-10-10 19:00:00","2009-10-10 18:00:00")

返回的是秒钟

//Get days and other datetime
//diffrence two datetime
// date1 :更早的日期小的日期
// date2 :后面的日期大的日期
// 返回两个时间差的天数小时数分数秒数和毫秒数
function DiffLong(datestr1, datestr2) {

    var date1 = new Date(Date.parse(datestr1.replace(/-/g, "/")));
    var date2 = new Date(Date.parse(datestr2.replace(/-/g, "/")));
    var datetimeTemp;
    var isLater = true;

    if (date1.getTime() > date2.getTime()) {
        isLater = false;
        datetimeTemp = date1;
        date1 = date2;
        date2 = datetimeTemp;
    }

    difference = date2.getTime() - date1.getTime();
    thisdays = Math.floor(difference / (1000 * 60 * 60 * 24));

    difference = difference - thisdays * (1000 * 60 * 60 * 24);
    thishours = Math.floor(difference / (1000 * 60 * 60));

    var strRet = thisdays + '天' + thishours + '小时';

    return strRet;
}