js 毫秒转换为标准时间

function dateForm(time){
var unixTimestamp = new Date( 1477386005*1000 );
commonTime = unixTimestamp.toLocaleString();
}
Date.prototype.toLocaleString = function() {
return this.getFullYear() + "/" + (this.getMonth() + 1) + "/" + this.getDate() + "/" + this.getHours() + ":" + this.getMinutes() + ":" + this.getSeconds();
};