转自： http://www.blogjava.net/emu/archive/2005/06/20/6365.html

 1 < html >< head >< title > emu -- 用fason的参数化定时器模拟多线程 </ title ></ head >< body >
 2 < SCRIPT  LANGUAGE ="JavaScript" >
 3 <!--
 4
 5 var _st = window.setTimeout;
 6 window.setTimeout = function(fRef, mDelay) {
 7     if(typeof fRef == 'function'){
 8         var argu = Array.prototype.slice.call(arguments,2);
 9         var f = (function(){ fRef.apply(null, argu); });
10        return _st(f, mDelay);
11    }
12    return _st(fRef,mDelay);
13}
14
15var _int = window.setInterval;
16window.setInterval = function(fRef, mDelay) {
17    if(typeof fRef == 'function'){
18        var argu = Array.prototype.slice.call(arguments,2);
19        var f = (function(){ fRef.apply(null, argu); });
20        return _int(f, mDelay);
21    }
22    return _st(fRef,mDelay);
23}
24
25
26function startNewTask(){
27    var target = document.getElementById("sampleResult").cloneNode(true);
28    with (target){
29    id="";style.display="block";style.color=(Math.floor(Math.random()* (1<<23)).toString(16)+"00000").substring(0,6);
30    }
31    document.body.insertBefore(target,document.body.lastChild);
32    var parameter = {target:target,n:0,result:0}
33    parameter.timer = setInterval(count,1,parameter);
34}
35
36function  count(parameter){
37    with (parameter){
38        if (!target.stop){
39            for(var i=0;i<speed;i++)
40                if (n<MAX) result += ++n;
41            target.innerHTML = result;
42        }
43        if (n>=MAX){
44            clearInterval(timer);
45            setTimeout(function(elm){document.body.removeChild(elm)},2000,target);
46        }
47    }
48}
49
50var speed = 1111;
51var MAX=100000;
52//-->
53 </ SCRIPT >
54 < button  onclick ="startNewTask()" > 开始新线程 </ button >
55
56 < BR >< BR >
57 < div  id =sampleResult  onmouseover ="this.stop=true"  onmouseout ="this.stop=false"  style ="display:none;cursor:hand" > 0 </ div >
58 </ body >
59 </ html >

<html><head><title>emu -- 用fason的参数化定时器模拟多线程</title></head><body> <SCRIPT LANGUAGE="JavaScript"> <!-- 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); } var _int = window.setInterval; window.setInterval = function(fRef, mDelay) { if(typeof fRef == 'function'){ var argu = Array.prototype.slice.call(arguments,2); var f = (function(){ fRef.apply(null, argu); }); return _int(f, mDelay); } return _st(fRef,mDelay); } function startNewTask(){ var target = document.getElementById("sampleResult").cloneNode(true); with (target){ id="";style.display="block";style.color=(Math.floor(Math.random()* (1<<23)).toString(16)+"00000").substring(0,6); } document.body.insertBefore(target,document.body.lastChild); var parameter = {target:target,n:0,result:0} parameter.timer = setInterval(count,1,parameter); } function count(parameter){ with (parameter){ if (!target.stop){ for(var i=0;i<speed;i++) if (n<MAX) result += ++n; target.innerHTML = result; } if (n>=MAX){ clearInterval(timer); setTimeout(function(elm){document.body.removeChild(elm)},2000,target); } } } var speed = 1111; var MAX=100000; //--> </SCRIPT> <button onclick="startNewTask()">开始新线程</button> <BR><BR> <div id=sampleResult onmouseover="this.stop=true" onmouseout="this.stop=false" style="display:none;cursor:hand">0</div> </body> </html> 点击这里查看效果