browser = navigator.appName;
	version = parseInt(navigator.appVersion);

	ie = "Microsoft Internet Explorer";
	nn = "Netscape";

	function removeFocus() { 
		for (a in document.links) document.links[a].onfocus = document.links[a].blur;
	}

	if(document.all) document.onmousedown = removeFocus;

	if (browser == ie && version >= 4) {
		document.oncontextmenu 	= function () {
						return false;
					  }
	}

	else if (browser == nn && version == 4) {
		document.captureEvents(Event.MOUSEDOWN);
		document.onmousedown = function (evt) {
						if (evt.which == 3) return false;
				       }
	}

	else if (browser == nn && version == 6) {
		document.onmouseup = function (evt) {
						if (evt.button == 3) event.preventDefault();
				     }
	}