var itemDivId = {
   't1' : 'LabT1',
   't2' : 'LabT2',
   't3' : 'LabT3',
   't4' : 'LabT4',
   't5' : 'LabT5',
   't6' : 'LabT6',
   't7' : 'LabT7',
   't8' : 'LabT8'
   };
var menuId = {
   't1' : 'MenuT1',
   't2' : 'MenuT2',
   't3' : 'MenuT3',
   't4' : 'MenuT4',
   't5' : 'MenuT5',
   't6' : 'MenuT6',
   't7' : 'MenuT7',
   't8' : 'MenuT8'
   };
var itemTimeout = null;
var menuItemTimeout = null;
var timer = null;
var colorOn = 'http://www.bresciaonline.it/or/BOL/imgs/c2/labelon_bnp.gif';
var colorOff = 'http://www.bresciaonline.it/or/BOL/imgs/c2/labeloff_bnp.gif';
var fontOn = '#0066CC';
var fontOff = '#FFFFFF';
var currentMenu = null;

function topnavItemOn(section) {
   if (!currentMenu || currentMenu != document.getElementById(menuId[section])) {
      topnavCurrentItemOff();
      currentMenu = document.getElementById(menuId[section]);
      currentMenuItem = document.getElementById(itemDivId[section]);
      currentMenuItem.style.backgroundImage = 'url(' + colorOn +')';
      currentMenu.style.visibility = 'visible';
      currentMenuItem.style.color = fontOn;
      currentMenuItem.childNodes[0].style.color= fontOn;
   }
}

function topnavCurrentItemOff() {
   if (currentMenu != null) {
      currentMenu.style.visibility = 'hidden';
      currentMenuItem.style.backgroundImage = 'url(' + colorOff +')';
      currentMenuItem.style.color = fontOff;
      currentMenuItem.childNodes[0].style.color = fontOff;
      currentMenu = null;
      currentMenuItem = null;
      // remove click-to-hide-menu handler
      document.onmouseup = function() {}
   }
}
function setvar(item) {
 topnavItemOn(item);
}