function openCloseSubs(id_categoria, img_path) {
	
    var subs_div = document.getElementById("subs_"+id_categoria);
    if(subs_div.style.visibility == 'visible') {
        subs_div.style.visibility = 'hidden';
        subs_div.style.display = 'none';
        setImage(id_categoria, 'close', img_path);
        }
    else {
        subs_div.style.visibility = 'visible';
        subs_div.style.display = 'block';
        setImage(id_categoria, 'open', img_path);
        }
    }

function setImage(id_categoria, image_status, img_path) {
	
    var img_div = document.getElementById("img_"+id_categoria);
    var link_div =document.getElementById("link_"+id_categoria);
    if(image_status=="none") {
        link_div.style.visibility = 'hidden';
        }
    else if(image_status=="open") img_div.src=img_path+"open_folder_USER.gif";
    else if(image_status=="close") img_div.src=img_path+"close_folder_USER.gif";
    
    }

function customFunction(id_categoria,online) {    
    document.location = 'prodotti.php?id_categoria='+id_categoria+'&online='+online;
    }