if (document.all) {
	 		//IE 5.+
	 		document.oncontextmenu =
	 			function () {
	 				return false;
	 			};
	 		/*document.onmousedown =
	 			function () {
	 				if (window.event.button == 2) {
	 					window.event.cancelBubble = true;
	 					window.event.returnValue = false;
		 				return false;
	 				}
	 			};*/
	 		document.onkeydown =
	 			function () {
	 				//alert("onKeyDown: " + window.event.keyCode + "\nsrcElement: " + window.event.srcElement.tagName);
	 				if ((window.event.keyCode == 78 && window.event.ctrlKey == true) || window.event.keyCode == 93) {
	 					window.event.keyCode = 0;
	 					window.event.cancelBubble = true;
	 					window.event.returnValue = false;
	 					return false;
	 				}
	 			};
		} else if (document.layers) {	 		
 			//NS 4.x
	 		document.captureEvents(Event.MOUSEDOWN);
	 		document.onmousedown =
	 			function (evt) {
	 				if (evt.which == 3)
	 					return false;
	 			};
		} else if (parseInt(navigator.appVersion) >= 5 && navigator.appName == "Netscape") {
	  		//NS 6.+
	  		document.onmouseup = function (evt) {
	  			if (evt.button == 3)
	  				event.preventDefault();
	  		}
		}