var aKeys = new Array();
		function alertkey(e) {
			if( !e ) {
				//if the browser did not pass the event information to the
				//function, we will have to obtain it from the event register
				if( window.event ) {
					//Internet Explorer
					e = window.event;
				} 
				else {
					//total failure, we have no way of referencing the event
					return;
				}
		  	}
		  	if( typeof( e.keyCode ) == 'number'  ) {
				//DOM
				e = e.keyCode;
		  	} 
			else if( typeof( e.which ) == 'number' ) {
				//NS 4 compatible
				e = e.which;
		  	} 
			else if( typeof( e.charCode ) == 'number'  ) {
				//also NS 6+, Mozilla 0.9+
				e = e.charCode;
		  	} 
			else {
				//total failure, we have no way of obtaining the key code
				return;
		  	}
			
			aKeys.push(String.fromCharCode(e));
			//alert(aKeys);
			if(aKeys[0] == "D" && aKeys[1] == "O" && aKeys[2] == "D" && aKeys[3] == "I") {
				document.getElementById("enter").setAttribute("src","uploads/pics/rafael2.jpg");
			}
		}

		document.onkeyup =alertkey;