<script type="text/JavaScript">
function hhuu(){
 if (document.getElementById("tag").value=="1")
 {document.all.zkf.checked="checked"; }
 
 if (document.getElementById("tag").value=="2")
 {document.all.zkf.checked=""; }
 }
</script>

<select name="tag" id="tag" onchange="hhuu()">
<option value="1">成功</option>
<option value="2">失败</option>
<option selected="selected">请选择</option>
</select>
<input name="zkf" type="checkbox" class="checkbox" id="zkf" value="yes"  />     
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