function mainmenu(){
$(" #nav ul ").css({display: "none"}); // Opera Fix
$(" #nav li").hover(
	function(){$(this).find('ul:first').css({visibility: "visible",display: "none"}).show(400);
	},
	function(){$(this).find('ul:first').css({visibility: "hidden"});
	});
}
$(document).ready(function(){
	mainmenu();
});

function ampliar(foto,ancho,alto){
	nuevaVentana = window.open(foto,"","height="+alto+",width="+ancho+",left=200,top=50,resizable=0,noresize=yes,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes")
}