请循环代码或思路~

请求一个循环代码或思路~~~！急急。。。。formname form1 method post action tablewidth 401

请求一个循环代码或思路~~~！急急。。。。
<form name= "form1 " method= "post " action= " ">
<table width= "401 " border= "1 ">
<tr>
<td width= "72 "> 预测结果 </td>
<td width= "90 "> 当前赔率 </td>
<td width= "50 "> 请选择 </td>
<td width= "161 "> 投注 </td>
</tr>
<tr>
<td> 0 </td>
<td>   </td>
<td> <label>
<input type= "checkbox " name= "checkbox1 " value= "1 " onClick= "return f(); ">
</label>
</td>
<td> <label>
<input name= "t1 " type= "text " size= "15 ">
</label> </td>
</tr>
<tr>
<td> 2 </td>
<td>   </td>
<td> <label>
<input type= "checkbox " name= "checkbox2 " value= "2 " >
</label> </td>
<td> <input name= "t2 " type= "text " size= "15 "> </td>
<tr>
<td> 3 </td>
<td>   </td>
<td> <label>
<input type= "checkbox " name= "checkbox3 " value= "3 ">
</label> </td>
<td> <input name= "t3 " type= "text " size= "15 "> </td>
</tr>
<tr>
<td> 4 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox4 " value= "checkbox "> </td>
<td> <input name= "t4 " type= "text " size= "15 "> </td>

</tr>
<tr>
<td> 5 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox5 " value= "checkbox "> </td>
<td> <input name= "t5 " type= "text " size= "15 "> </td>
</tr>
<tr>
<td> 6 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox6 " value= "checkbox "> </td>
<td> <input name= "t6 " type= "text " size= "15 "> </td>
</tr>
<tr>
<td> 7 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox7 " value= "checkbox "> </td>
<td> <input name= "t7 " type= "text " size= "15 "> </td>
</tr>
<tr>
<td> 8 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox8 " value= "checkbox "> </td>
<td> <input name= "t8 " type= "text " size= "15 "> </td>
</tr>
<tr>
<td> 9 </td>
<td>   </td>
<td> <input type= "checkbox " name= "checkbox9 " value= "checkbox "> </td>
<td> <input name= "t9 " type= "text " size= "15 "> </td>
</tr>
</table>
</form>
我想法是。。当checkbox[]任意一个被选中后，对应的文本框值是10，再一次先勾则取消。共有28个checkbox。我想请求一个循环代码或思路。。。谢谢了

[解决办法]
<html>

<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<title> 新建网页 1 </title>
<script>
function f(obj){
if(obj.checked){
obj.parentNode.nextSibling.firstChild.value=10;
}else{
obj.parentNode.nextSibling.firstChild.value= " ";
}
}
</script>
</head>