var navegante=navigator.appName // Descobre Navegador


if (navegante=="Microsoft Internet Explorer"){ // INICIO (IE)

    function click() {
                      if (event.button==2||event.button==3) {
                           oncontextmenu='return false';
                      }
    }

    document.onmousedown=click
    document.oncontextmenu = new Function("return false;")

    function disableselect(e){
    return false
    }

    function reEnable(){
    return true
    }

    document.onselectstart=new Function ("return false")
    if (window.sidebar){
        document.onmousedown=disableselect
        document.onclick=reEnable
    }

} // FIM (IE)


if (navegante=="Netscape"){  // NETSCAPE e FIREFOX

function mouseDown(e) {
var shiftPressed=0;
var ctrlPressed=0;
if (parseInt(navigator.appVersion)>3) {

  if (navigator.appName=="Mozilla")
       shiftPressed=(e.modifiers-0>3);
  else shiftPressed=event.shiftKey;

  if (navigator.appName=="Mozilla")
       ctrlPressed=(e.modifiers-0>1);
  else ctrlPressed=event.ctrlKey;

  if (shiftPressed || ctrlPressed) {
   return false;
  }

}
return true;
}

if (parseInt(navigator.appVersion)>3) {
document.onmousedown = mouseDown;
   if (navigator.appName=="Netscape")
     document.captureEvents(Event.MOUSEDOWN);
}
document.oncontextmenu=new Function("return false;");



}