onKeyUpHandler

<html>
 <head>
  <style type="text/css">
    #abc{ boarder:1px solid black; width: 500px; height: 40px;}
  </style>
 <script type="text/javascript">
 function onKeyUpHandler(campo, funcao, tempo,paramentro)
{
   var searchTimeout;
   campo.onkeyup = function (event)
   {
      var tecla = (window.Event) ? event.which : event.charCode;
      if (typeof searchTimeout != "undefined") clearTimeout(searchTimeout);
      if (typeof paramentro == "undefined") paramentro = "";
      else{var string = new String(paramentro);
      if (string.substr(0,1)!=',') paramentro = ",'"+paramentro+"'"; }
      searchTimeout = setTimeout(funcao+"("+campo.id+","+tecla+paramentro+")", tempo);
  };
}
 function funcaoteste(nomecampo, teclapress)
 {
        document.getElementById('def').innerHTML += nomecampo+'|'+teclapress+'<br />';
        document.getElementById('def2').innerHTML += nomecampo.value+'<br />';
 }
 function criaInput()
 {
      document.getElementById('abc').innerHTML = '<input type="text" name="idteste" id="idteste" value=""  onfocus="if (this.onkeyup==null) onKeyUpHandler(this,\'funcaoteste\',1000);"  />';
 }
 </script>
 </head>
 <body>
   <div id="abc"></div>
   <div id="def"></div>
   <div id="def2"></div>
   <div id="ghi">
     <input type="button" value="Novo Input" onclick="criaInput();"/>
   </div>
 </body>
</html>