修改 window.setTimeout，使之可以传递参数和对象参数

var _setTimeout=setTimeout;
window.setTimeout=function(callback,time,params){
var param=Array.prototype.slice.call(arguments,2);
var _callback=function(){
callback.apply(null,param);
}
_setTimeout(_callback,time);
}

function test(param){
alert(param);
}
function test2(a,b,c){
alert(a+b+c);
}

var obj=new Object();
window.setTimeout(test,100,obj);
window.setTimeout(test2,100,obj,1,2);