-(function($){        var caculation = function(gap){            var minutes = 1000 * 60            var hours = minutes * 60            var days = hours * 24            var years = days * 365            if(gap/years >= 1){                return parseInt(gap/years)+‘年‘;            }else if(gap/days >= 30){                return parseInt(gap/days/30)+‘个月‘            }else if(gap/hours >= 24){                return parseInt(gap/hours/24)+‘天‘            }else if(gap/minutes >=60){                var num = gap/minutes/60;                var intNum = parseInt(gap/minutes/60);                return intNum+‘小时‘+parseInt((num.toFixed(4)-intNum)*60)+‘分钟‘            }else{                return parseInt(gap/minutes)+‘分钟‘            }        }        $.extend({            nowToTime:function(time){                var theTime = Date.parse(time .replace(/-/g,"/"));                var curDate=new  Date().valueOf();//当前时间的时间戳                var gap = theTime - curDate                return theTime <=curDate?                alert("请选择大于今天的时间！"):                caculation(gap);                            },            timeToNow:function(time){                var theTime = Date.parse(time .replace(/-/g,"/"));                var curDate=new  Date().valueOf();                var gap =  curDate - theTime;                return theTime <=curDate?                caculation(gap):                alert("请选择小于今天的时间！");            }        })    })(jQuery);

console.log($.nowToTime(‘2017-7-16 17:51:34‘)+‘后‘);console.log($.timeToNow(‘2017-07-15 18:01:23‘)+‘前‘);

23小时36分钟后13分钟前