//MENU
table_contract = new Image(1,1);
table_contract.src = "chiuso.gif";
table_expand = new Image(1,1);
table_expand.src = "aperto.gif";

function expandDiv(tahw) {
                what  = eval(tahw + "_menu");
                where = eval(tahw + "_table");
                goto  = eval(tahw + "_link");
                if (what.style.display == "none") {
                        what.style.display = "";
                        where.src = table_expand.src;
                        
                } else {
                        what.style.display = "none";
                        where.src = table_contract.src;
                        
                }
}