function open_img (link) 
{
	window.open (link, "popup_images", "width=800, height=600, menubar=no, status=no, scrollbars=yes, resizable=yes");
}
function open_dispo (link) //ouvrir les images dans une nouvelle fenetre
{
	window.open (link, "Disposition", "width=600, height=600, menubar=yes, status=no, scrollbars=yes");
}