怎么防止重复提交

<input type="submit" name="button" id="button" value="提交" onclick="javascript:this.disabled=-1" />

 

 

<script type="text/javascript">
function checkSubmit() {
  if (checkSubmitFlg == true) {
    return false;
  }
  checkSubmitFlg = true;
  return true;
}
</script>
<form onsubmit="return checkSubmit();" method="post">
在IE6和FIREFOX上实验下来都有效
自己拿去把<form ....>里的套进去