function norightclickmenu(){
	document.oncontextmenu = function(){return false}
	if(document.layers) {
    		window.captureEvents(Event.MOUSEDOWN);
    		window.onmousedown = function(e){
        			if(e.target==document)return false;
    			}
		}
	else {
    		document.onmousedown = function(){return false}
		}

	}