<script type="text/javascript">
 var tid;
 var bClicked = false;
 function sbm(){
     if(bClicked){
         alert("提示您，请不要重复递交");
         return false;   
     }
     bClicked = true;
     tid = setTimeout("doit()", 10000);
     //document.forms[0].submit();
 }function doit(){
     if(tid!=null){clearTimeout(tid);tid=null;}
     bClicked = false;
 }
 </script><form action="xxx" target="hf">
  <input name="btn" type="button" οnclick="sbm();" value=" 提交 ">
 </form>
<iframe name="hf"></iframe>