var isW3C = false;

var isNS = false;

var isIE = false;

function BrowserCheck() {

  if (document.layers) {  // NS 4 DOM

    isNS = true;

  }

  else if (document.all && !document.getElementById) { // IE 4 DOM

    isIE = true;

  }

  else if (document.getElementById) { // W3C standards-compliant DOM

    isW3C = true;

  }

  if (isW3C) {

    isNS = (navigator.appVersion.charAt(0)>=4 && (navigator.appName).indexOf("Netscape") != -1);

    isIE = (navigator.appVersion.charAt(0)>=4 && (navigator.appVersion).indexOf("MSIE") != -1);

  }

}

function tierMenu(index) {

   var divName='menu'+index; //DIV ID

   var imName='img'+index; //IMG ID

   if (isW3C == true) { // W3C standards-compliant DOM

      if (document.getElementById(divName).style.display == 'none')

      {

         document.getElementById(imName).src = '/sanfermo_files/images/interfaccia/icone/meno.gif';

      }

      else

      {

         document.getElementById(imName).src = '/sanfermo_files/images/interfaccia/icone/piu.gif';

      }



      if (document.getElementById(divName).style.display == 'none')

      {

         document.getElementById(divName).style.display = 'block';

      }

      else

      {

         document.getElementById(divName).style.display = 'none';

      }

/*

      var continua = true;

      var startMenu = 0;

      while (continua)

      {

        startMenu = ++startMenu;

      	if (startMenu != index)

        {

          divName='menu'+startMenu; //DIV ID

          if (document.getElementById(divName) != null)

          {

             imName='img'+startMenu; //IMG ID

             document.getElementById(divName).style.display = 'none';

             document.getElementById(imName).src = '../images/piu.gif';

          } else {

            continua = false;

          }

        }

      }

*/

   }

}