function afficherDessous(idObj,idRef) {
	var obj = document.getElementById(idObj);
	var ref = document.getElementById(idRef);
	if (obj == null || ref == null) {
		return;
	}
	obj.style.left=ref.offsetLeft+'px';
	obj.style.top=(ref.offsetTop+ref.offsetHeight)+'px';
	obj.style.width=ref.offsetWidth+'px';
	obj.style.display="block";
}

function set_active(nom)
{
	element = document.getElementById(nom);
	if (element != null) {
		element.style.backgroundColor = "#BBBBBB";
	}
}