var msg = "Copyright 2007 ThirdForce"
if(document.layers) window.captureEvents(Event.MOUSEDOWN);


function cancelBack() {
	if ((event.keyCode == 8 && (event.srcElement.form == null || event.srcElement.isTextEdit == false)) || event.keyCode == 37 && event.altKey || event.keyCode == 39 && event.altKey) {  
		event.cancelBubble = true;
		event.returnValue = false;
	}
}