function check_stock(reference) {
	var selected=document.getElementById('prodpatine_ob').selectedIndex;
	var patine=document.getElementById('prodpatine_ob').options[selected].value;
	if(!patine) patine='%';

	// Péparation de lancement de requête http
	xmlHttp = initialize_xmlhttprequest();
	if (xmlHttp != false) {
		xmlHttp.open("GET", './check_stock.php?codice='+reference+'&patine='+patine, true);
		xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		xmlHttp.send();
		xmlHttp.onreadystatechange=function() {
        	if (xmlHttp.readyState == 4  &&  xmlHttp.status == 200) {
				if(xmlHttp.responseText.split(' : ')[1]!="0\n") {
					document.getElementById('prodquant_int').style.display='block';
					document.getElementById('lbl_prodquant').firstChild.nodeValue=xmlHttp.responseText;
					document.getElementById('alert_reassort').style.display='none';
				}
				else { 
					document.getElementById('prodquant_int').style.display='none';
					document.getElementById('lbl_prodquant').firstChild.nodeValue=xmlHttp.responseText;
					document.getElementById('alert_reassort').style.display='block';
					// document.getElementById('alert_reasort').style.display='block';
				}
			}
		}
	}
}