var _st = window.setTimeout;
window.setTimeout = function(fRef, mDelay){
 if (typeof fRef == 'function') {
  var argu = Array.prototype.slice.call(arguments, 2);
  var f = function(){
    fRef.apply(null, argu);
  };
  return _st(f, mDelay);
 }
 return _st(fRef, mDelay);
}

setTimeout(fun,10,param);

function moveing(id,target_x,target_y,t){
 var ele = document.getElementById(id);
 //alert("divObject: "+ele)
 var xpos = parseInt(ele.style.left);
 //alert(ele.style.left)
 var ypos = parseInt(ele.style.top);
 if(xpos < target_x){
 xpos++;
 }
 if(ypos < target_y ){
 ypos++;
 }
 ele.style.left = xpos + "px";
 ele.style.top = ypos + "px";
//被递归调用的函数本身，拼成字符串形式，注意第一个参数的引号
 var repeat ="moveing('"+id+"',"+target_x+","+target_y+","+t+")"; 
 var movment = setTimeout(repeat,t);
}