var TIDV = '';

function obre_menu_video (nmen, tmen) {
         if(document.getElementById ('menu500').style.visibility== 'visible') {  tanca_menus_infovyc (10); } ;
         if(document.getElementById ('menu600').style.visibility== 'visible') {  tanca_menus_facebook (10); } ;
         document.getElementById ('menu' + nmen).style.visibility   = 'visible';

}

function tanca_menus_video (tmen) {

      document.getElementById ('menu400').style.visibility   = 'hidden';

}