<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>  <TITLE> New Document </TITLE> </HEAD>
<script>
var x=3;
function ff(){
 var yok = '18';
 var st = t.value;
 while(true){
   e = st.indexOf(yok);
   if(e<0)break;
   r.value = st.slice(0,e);
   r.value += st.slice(e+yok.length);
   st = r.value;
 }
}
</script>
 <BODY>
 <input id=t  value="aaaa18aaaa"><br>
 <input id=b  type=button value="클릭" onclick="ff()"><br>
 <input id=r  value=""><br>
 
 </BODY>
</HTML>
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