var isNS = (navigator.appName == "Netscape") ? 1 : 0; if(navigator.appName == "Netscape") document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP); function mischandler(){ return false; } function mousehandler(e){ var myevent = (isNS) ? e : event; var eventbutton = (isNS) ? myevent.which : myevent.button; if((eventbutton==2)||(eventbutton==3)) return false; } document.oncontextmenu = mischandler; document.onmousedown = mousehandler; document.onmouseup = mousehandler;