function Universe(){
var instance;
Universe = function (){
return instance;
}
Universe.prototype = this;
console.log(Universe);
instance = new Universe();
instance.constructor = Universe; instance.start_time = 0;
instance.bng ="dd";
return instance;
} Universe.prototype.nothint = 1;
console.log(Universe);
var a = new Universe();
console.log(Universe);
var b = new Universe();
单例模式