JavaScript 经典代码（2）

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<style>
BODY {FONT-SIZE: 9pt;}
table {FONT-SIZE: 9pt;}
</style>

<input type=checkbox id=checkall onclick=check_all()><label for=checkall>全部选择</label>　　　　
线程数：<input type=text id=the_thread value=10 size=2 maxlength=2 style="height:15px; font-size:12px;padding:0px">
<br>
<table border=0>
<tr><td style="100px;over-flow:hidden"><span id=show></span></td>
<td style="400px;">
<table id=bar style="90%;height:10px;border:1px black solid;display:none"><tr>
<td id=bar1 bgcolor=skyblue style="0%"></td>
<td id=bar2 style="100%"></td>
</tr></table>
</td></tr>
<tr><td colspan=2><span id=result></span></td></tr>
</table>
<script language="JavaScript">

var total = 505;
var thread_num;
var pre_thread;
var thread = new Array();
var completed = 0;
var start_time = null;

for(i=0;i<total;i++)document.write("<input type=checkbox id=cbox>");

function init_para(){
 thread_num = parseInt(the_thread.value);
 if(isNaN(thread_num)) thread_num = 10;
 pre_thread = Math.floor(total/thread_num);
 result.innerText = "";
 bar1.style.width = "0%";
 bar2.style.width = "100%";
 bar.style.display = "";
}

function check_all(){
 checkall.disabled = true;
 init_para();
 for(var i=0;i<thread_num;i++){
  thread[i]=[setInterval("thread["+i+"][1]<pre_thread?check_unit("+i+"*pre_thread + thread["+i+"][1]++):clearInterval(thread["+i+"][0])",1),0];
 }
 thread[i]=[setInterval("thread["+i+"][1]<total%thread_num?check_unit("+i+"*pre_thread + thread["+i+"][1]++):clearInterval(thread["+i+"][0])",1),0];
}

function check_unit(num){
 if(completed==0)start_time=new Date;
 cbox[num].checked=checkall.checked;
 completed++;
 var cur_rate = Math.round(completed*100/total);
 show.innerText = completed + "/" + total + " : " + cur_rate + "%";
 bar1.style.width = cur_rate + "%";
 bar2.style.width = (100-cur_rate) + "%";
 if(completed == total){
  completed = 0
  checkall.disabled = false;
  result.innerText = "("+total+"单元/"+thread_num+"线程，总共耗时："+((new Date)-start_time)+" ms)";
 }
}
</script>