function setHover(el){
	el.parentNode.className = "hovering";
}
function unsetHover(el){
	el.parentNode.className = "unselected";
}

function setCarroussel(carrousselId,imgName,caption){
    newUrl = "url('public/images/"+imgName+".jpg')";
    $('carroussel_' + carrousselId).style.backgroundImage = newUrl;
    $('text_' + carrousselId).innerHTML = caption;
}