Rechten Mouseclick deaktivieren

<script type="text/javascript">
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
<!-- Original script at: http://elouai.com/scripts.php -->

<!--
var ie  = document.all
var ns6 = document.getElementById&&!document.all
var isMenu  = false ;
var menuSelObj = null ;
var overpopupmenu = false;
function mouseSelect(e)
{
  var obj = ns6 ? e.target.parentNode : event.srcElement.parentElement;
  if( isMenu )
  {
    if( overpopupmenu == false )
    {
      isMenu = false ;
      overpopupmenu = false;
      document.getElementById('menudiv').style.display = "none" ;
      return true ;
    }
    return true ;
  }
  return false;
}
// POP UP MENU
function  ItemSelMenu(e)
{
  var obj = ns6 ? e.target.parentNode : event.srcElement.parentElement;
      menuSelObj = obj ;
  if (ns6)
  {
    document.getElementById('menudiv').style.left = e.clientX+document.body.scrollLeft;
    document.getElementById('menudiv').style.top = e.clientY+document.body.scrollTop;
  } else
  {
    document.getElementById('menudiv').style.pixelLeft = event.clientX+document.body.scrollLeft;
    document.getElementById('menudiv').style.pixelTop = event.clientY+document.body.scrollTop;
  }
  document.getElementById('menudiv').style.display = "";
  document.getElementById('item1').style.backgroundColor='#FFFFFF';
  document.getElementById('item2').style.backgroundColor='#FFFFFF';
  document.getElementById('item3').style.backgroundColor='#FFFFFF';
  document.getElementById('item4').style.backgroundColor='#FFFFFF';
  isMenu = true;
  return false ;
}
document.onmousedown  = mouseSelect;
document.oncontextmenu  = ItemSelMenu;
//-->
</script>









die farben selber ändern, probiere es mal  in den Body einbauen, nicht vergessen

Möchte mir meine Bilder auf meiner Homepage nicht stehlen lassen und will daher den rechten Mouseclick (Bild speichern unter ) verbieten.