var message="";

	function clickIE() {
		if (document.all) {
			(message);return false;
			}
		}
	function clickNS(e) {
		if (document.layers||(document.getElementById&&!document.all)) {
			if (e.which==2||e.which==3) {
				(message);return false;
				}
			}
		}
		
		if (document.layers) {
			document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;
		}else{
			document.onmouseup=clickNS;document.oncontextmenu=clickIE;
		}
		
		document.oncontextmenu	= new Function("return false")
		document.onkeydown		= function desabilita_control(e){
		//tabelas de keycode
		//http://www.codigosnaweb.com/tutoriais/block_letra.html

		if(window.event) { 
			//IE
			keycode = window.event.keyCode
			if(window.event.ctrlKey && keycode==85){ //ctrl u
				void(0);
				return false;
			}else if(window.event.ctrlKey && keycode==65){ //ctrl a
				void(0);
				return false;
			}else if(window.event.ctrlKey && keycode==83){ //ctrl S
				void(0);
				return false;
			}else{
			}
				
		}else{
			//firefox
			if (e.ctrlKey && e.keyCode==85){ //ctrl a
				return false;
				void(0);
				alert("a");
		
			}else if (e.ctrlKey && e.keyCode==65) {//ctrl u
				return false;
				void(0);
			}else if (e.ctrlKey && e.keyCode==83){ //ctrl S
				return false;
				void(0);
			}else{ 
			///final elses
			}
		}
	}