function getModeles()
{
        var img = $('load-modele');
		if (img != null)
		{
			img.style.display = 'inline';
		}
        var marques = document.forms['lists'].marque;
        var marque = "";
        //alert(marques);
        for (i = 0; i < marques.options.length; i++)
            {
                if (marques.options[i].selected)
                {
                    marque += marques.options[i].value;
//                    alert(marque);
                }
            }

        var url = urlgetModeles;
        var request = new Ajax.Updater(
			'modele',
			urlgetModeles,
			{
			    method: 'get',
			    parameters: { id: marque },
                onSuccess: function(transport, json) {
                    var img = $('load-modele');
                    if (img != null)
                    {
                        img.style.display = 'none';
                    }
			    }
			}
		);
}

function getReferences()
{
        var img = $('load-ref');
		if (img != null)
		{
			img.style.display = 'inline';
		}
        var modeles = document.forms['lists'].modele;
        var modele = "";
        //alert(marques);
        for (i = 0; i < modeles.options.length; i++)
            {
                if (modeles.options[i].selected)
                {
                    modele += modeles.options[i].value;
//                    alert(marque);
                }
            }

        var url = urlgetReferences;
        var request = new Ajax.Updater(
			'reference',
			urlgetReferences,
			{
			    method: 'get',
			    parameters: { id: modele },
                onSuccess: function(transport, json) {
                    var img = $('load-ref');
                    if (img != null)
                    {
                        img.style.display = 'none';
                    }
			    }
			}
		);
}