function zum () {
    $('marco').setStyles({width: '140px', height: '105px'});

    $('imagen').setStyles({width: '140px', height: '105px'});
    $('imagen').addEvent('mouseover', function () {
        if (ampliada) return true;
        this.set('morph', {duration: 'short', transition: 'quad:out'});
        this.morph({width: '280px', height: '210px', 'margin-left': '-140px'});
        ampliada = true;
    });
    $('imagen').addEvent('mouseout', function () {
        if (!ampliada) return true;
        this.set('morph', {duration: 'short', transition: 'quad:out'});
        this.morph({width: '140px', height: '105px', 'margin-left': '0'});
        ampliada = false;
    });

    $('pic').setStyle('position', 'absolute');
    $('pic').setStyle('z-index', 1000);
    coord = $('marco').getPosition();
    coord.y = coord.y - 10;
    $('pic').setPosition(coord);
    $('pic').setStyle('visibility', 'visible');
}

ampliada = false;
window.addEvent('domready', function() {zum();});