<script language="javascript">
function showMenu(id) {
  if(document.getElementById(id).style.visibility == "hidden") {
    document.getElementById(id).style.position		= "static";
    document.getElementById(id).style.visibility	= "visible";
  }
  else {
    document.getElementById(id).style.visibility	= "hidden";
    document.getElementById(id).style.position		= "absolute";
    document.getElementById(id).style.left		= -100;
    document.getElementById(id).style.top		= -100;
  }

  document.getElementById('mainTable').height		= '100%';
}
</script>
