$(document).ready(function (){
	$("img.rolloverimagen").mouseover(function (){
			var newImage = $(this).attr('src').replace(/^(.*?)(\.(?:gif|jpg|png))$/, "$1_over$2");
			$(this).attr('src', newImage);
	});
	$("img.rolloverimagen").mouseout(function (){
			var newImage = $(this).attr('src').replace('_over', '');
			$(this).attr('src', newImage);
	});
});

function muestra_capa(){
	$("#total").css({ display: "block" });
	$("#producto_total").css({ display: "block" });
}

function oculta_capa(){
	$("#total").css({ display: "none" });
	$("#producto_total").css({ display: "none" });	
}