function obj_mc(){
	return(false);
}
	
var Mac = navigator.userAgent.indexOf("Mac") != -1   ? true : false;
function mdown(e) {
	if (navigator.appName == "Microsoft Internet Explorer") {
		if ((event.button & 2) || (Mac && (event.ctrlKey || event.keyCode == 91))) {
			return false;
		}
		if(event.keyCode == 121){
			return false;
		}
	} else if (navigator.appName == "Netscape") {
		if (e.which == 3 || e.modifiers == 2 || e.ctrlKey) {
			return false;
		}
		if(e.keyCode == 121){
			return false;
		}
	}
}

if (document.all) {
	document.onmousedown=mdown;
	document.onkeydown=mdown;
	document.oncontextmenu=obj_mc;
}
if (document.layers) {
	window.onmousedown=mdown;
	window.captureEvents(Event.MOUSEDOWN);
	window.onkeydown=mdown;
	window.oncontextmenu=obj_mc;
}
if (navigator.appName == "Netscape"){
	document.onmouseup=mdown;
	documnet.onkeydown=mdown;
	document.oncontextmenu=obj_mc;
}