Javascript - modificare dimensione di un

  <frameset border="0px" cols="*,754,*">
    <frame name="frame_out1" src="pages/blank.htm" scrolling="no">
    <frameset border="0px" rows="186,*">
      <frame name="frame_top" src="pages/top.htm" frameborder="0" scrolling="no" noresize>
      <frameset border="0px" cols="150,*">
        <frame name="frame_left" src="pages/menu.htm" frameborder="0" scrolling="no" noresize>
        <frame name="frame_center" src="pages/home.php" frameborder="0" scrolling="no" noresize>
      </frameset>
    </frameset>
    <frame name="frame_out2" src="pages/blank.htm" scrolling="no">
  </frameset>

.scrl {
  overflow: auto;
}

    <script language="javascript" type="text/javascript">
      function altezzadiv() {
        var winH;
        
        if (parseInt(navigator.appVersion)>3) {
         if (navigator.appName=="Netscape") {
          winH = window.innerHeight-16;
         }
         if (navigator.appName.indexOf("Microsoft")!=-1) {
          winH = document.offsetHeight-20;
         }
        }
        return winH;
      }
    </script>

<div class="scrl" id="cont" align="center"><table> ... </table></div>