多线程的全选复选框

代码如下:
<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="width:100px;over-flow:hidden"><span id=show></span></td>
<td style="width:400px;">
<table id=bar style="width:90%;height:10px;border:1px black solid;display:none"><tr>
<td id=bar1 bgcolor=skyblue style="width:0%"></td>
<td id=bar2 style="width:100%"></td>
</tr></table>
</td></tr>
<tr><td colspan=2><span id=result></span></td></tr>
</table>
<script language="JavaScript">
/*
This following code are designed and writen by Windy_sk <seasonx@163.net>
You can use it freely, but u must held all the copyright items!
*/
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>

下面是运行效果
<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"> <table border=0> <tr><td style="width:100px;over-flow:hidden"><span id=show></span></td> <td style="width:400px;"> <table id=bar style="width:90%;height:10px;border:1px black solid;display:none"><tr> <td id=bar1 bgcolor=skyblue style="width:0%"></td> <td id=bar2 style="width:100%"></td> </tr></table> </td></tr> <tr><td colspan=2><span id=result></span></td></tr> </table> <script language="JavaScript"> /* This following code are designed and writen by Windy_sk <seasonx@163.net> You can use it freely, but u must held all the copyright items! */ 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>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]