function evento(){
}
evento.prototype.getEvent = function(e){
	if(window.event) return window.event;
	else return e;	
}
evento.prototype.keyCode = function(e){
	return this.getEvent(e).keyCode;
}
evento.prototype.target = function(e){
	if(window.event) return event.srcElement;
	else return e.target;
}
evento.prototype.noDefault = function(e){
	if(window.event) return event.returnValue = false;
	else return e.preventDefault();	
}
evento.prototype.keyPressed = function(e){
	var key = this.keyCode(e);
	if(key == 9) 		return 'TAB';
	if(key == 27) 	return 'ESC';
	if(key == 113) 	return 'F2';
	if(key == 114) 	return 'F3';
	if(key == 119) 	return 'F8';
	if(key == 46) 	return 'CANC';
	if(key == 38) 	return 'UP';
	if(key == 40) 	return 'DOWN';
	if(key == 13) 	return 'INVIO';
	if(key == 32) 	return 'BAR';
	if(key == 33) 	return 'PGUP';
	if(key == 34) 	return 'PGDOWN';
	if(key == 45) 	return 'INS';
	else return key;	
}