function interact(menu,id,onsrc) {
var m = document.getElementById(menu);
m.src=onsrc;
var d = document.getElementById(id);
if (d) {
	if (d.style.display == "none") {
		d.style.display = "block";
	} else {
		d.style.display = "none";
	}
}
}

function rollover(menu,onsrc,offsrc) {
	imgsrc=document.getElementById(menu).src;
	if (imgsrc  == offsrc) {
		document.getElementById(menu).src=onsrc;
	} else {
		document.getElementById(menu).src=offsrc;
	}
}

function verifComp(form) {
	var c=0;
	for (i=0;i<document.comparator.elements['compareProduct[]'].length;i++)
	{
		if (document.comparator.elements['compareProduct[]'][i].checked) c++;
	}
	if ((c > 1) && (c < 5))
	{
		return true;
	} else {	
		alert("Vous devez cocher entre 2 et 4 produits");
		return false;
	}
}