function doMouseUp() {
	if (navigator.appName == "Netscape") {
		document.releaseEvents(Event.MOUSEMOVE);  
	}
}
function doMouseDownIE() {
	if (event.button==2 ||event.button==3) {		
		registro();
	}else{		
		//document.clear() 
	}
}
function doMouseDownNS(e) {	

	if (e.which == 3) {		
		registro()
		return false;
	}
	document.routeEvent(e)
}
function begindrag() {		
	if (event.button==1){
		return false;
	}else{
		window.event.cancelBubble=true;
		return false;
	}
}	
if (navigator.appName != "Netscape") {	  
	document.onmousedown = doMouseDownIE; 
	document.onmouseup = doMouseUp; 
	document.onmousemove = begindrag; 
}else{
	document.captureEvents(Event.MOUSEUP|Event.DBLCLICK|Event.MOUSEDOWN);			
	document.onmouseup=doMouseUp;	
	document.onmousedown = doMouseDownNS
}		

function registro(){
	alert('Copyright © 1993 CBT España\n\n')
}