<!-- FUNCION CAMBIA IMAGEN ONMOUSEOVER -->

if (document.images) {
image1on = new Image();
image1on.src = "./imagenes/leer_mas_on.jpg";
image1off = new Image();
image1off.src = "./imagenes/leer_mas.jpg";

image2on = new Image();
image2on.src = "./imagenes/leer_mas_on.jpg";
image2off = new Image();
image2off.src = "./imagenes/leer_mas.jpg";

<!-- Imagenes microPIXEL -->
image3on = new Image();
image3on.src = "./imagenes/micropixel.jpg";
image3off = new Image();
image3off.src = "./imagenes/micropixel_off.jpg";

} 
function changeImages() {
if (document.images) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
}}}