转换时间戳与时间截取

//时间截取与转换时间戳

function timeChange(timeStamp) {    var newDate = new Date(timeStamp);    Date.prototype.format = function (format) {        var date = {            "M+": this.getMonth() + 1,            "d+": this.getDate(),            "h+": this.getHours(),            "m+": this.getMinutes(),            "s+": this.getSeconds(),            "q+": Math.floor((this.getMonth() + 3) / 3),            "S+": this.getMilliseconds()        };        if (/(y+)/i.test(format)) {            format = format.replace(RegExp.$1, (this.getFullYear() + ‘‘).substr(4 - RegExp.$1.length));        }        for (var k in date) {            if (new RegExp("(" + k + ")").test(format)) {                format = format.replace(RegExp.$1, RegExp.$1.length == 1                        ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));            }        }        return format;    };    var time = newDate.format(‘yyyy-MM-dd hh:mm:ss‘);//查找时间点,转换成时间类型    return time;}var tim= 1469980800000;var newT=timeChange(tim).substr(8,8).replace(" ","日");console.log(newT);

var time=(timeChange(tim-7*1000*24*60*60).substr(5,5)).replace("-"," ")+"～"+(timeChange(tim).substr(5,5)).replace("-"," ");console.log(time);var time1=(timeChange(tim-7*1000*24*60*60).substr(5,5)).replace("-","")+"～"+(timeChange(tim).substr(5,5)).replace("-","");console.log(time1);