复选框全选.js

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">
 </HEAD>


<body>
<script>

function CheckAll()
{
      for (var i=0;i<document.main_form.elements.length;i++)
      {
        var e = document.main_form.elements[i];
        if (e.name == 'item_select')
          e.checked = document.main_form.allbox.checked;
      }
}
</script>
<form style="margin:0 0 0 0;"   method='post' name='main_form'   action="#" >
<INPUT NAME='allbox' class='noBorder' TYPE='checkbox' value='Check All' onClick='CheckAll()' title='选择/取消所有项'><br />

   <input type=checkbox class='noBorder' name='item_select' value="2" /><br />
   <INPUT NAME='item_select' class='noBorder' TYPE='checkbox' value='1'><br />
   <INPUT NAME='item_select' class='noBorder' TYPE='checkbox' value='1'><br />
   </form>
</body>

</HTML>