两个日期相减得出天数

$(function(){
    +function ($, app) {
        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();
            //alert((date1 - date2) / (1000*60*60));
            return (date1 - date2) / (1000 * 60 * 60 * 24); //结果是小时
        }
        //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();
        }
       // 点击一个按钮，获取两个输入框的值
        $('.day').click(function () {
//获取值
            var Sdates = $('#s_date').html();
            var Jdates = $('#j_date').html();
// 带入方法
            t = dateDiff(Jdates, Sdates);
//回显
            $('.day').html(t+'天');
        });
    }(window.jQuery, window.app);
});