//
var usermain=navigator.appName + " " + (parseInt(navigator.appVersion) >= 4.0);
  (((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )));
var maininfo=usermain.substring(0, 14);
//
function click (e)
 {
  if (!e)
      {
       e = window.event;
      }
  if ((e.type && e.type == "contextmenu") || (e.button && e.button == 2) || (e.which && e.which == 3))
      {
       if (window.opera) window.alert("keine Möglichkeit");
       return false;
      }
 }
if (document.layers)
    {
     document.captureEvents(Event.MOUSEDOWN);
    }
document.onmousedown = click;
document.oncontextmenu = click;