function showActiveMenu(id) {
id2="ref"+id;
id="ref"+id+"_a";
if (document.getElementById(id)) {
 document.getElementById(id).style.color='#ffffff';
 document.getElementById(id2).style.backgroundColor='#8f0000';
 }
 }

function closeActiveMenu(id) {
id2="ref"+id;
id="ref"+id+"_a";
if (document.getElementById(id)) {
 document.getElementById(id).style.color='';
 document.getElementById(id2).style.backgroundColor='';
 }
 }