Silent No-Right Click(works on all browsers)

function nrcIE()
  {if (document.all)
      {return false;
      }
  }

function nrcNS(e)
  {if (document.layers || (document.getElementById && ! document.all))
      {if (e.which == 2 || e.which == 3)
          {return false;
          }
      }
  }

if (document.layers)
  {document.captureEvents(Event.MOUSEDOWN);
    document.onmousedown = nrcNS;
  }
else
  {document.onmouseup = nrcNS;
    document.oncontextmenu = nrcIE;
  }
document.oncontextmenu = new Function("return false");