var activeslide=0
function nextslide() {
/*nasconde la slide precedentemente attiva */ 
document.getElementById('slide'+activeslide).style.display='none'
/*cambia la slide attiva*/
if( ! document.getElementById('slide'+ ++activeslide) )
activeslide=0
/*far apparire la nuova slide  */ 
document.getElementById('slide'+activeslide).style.display='block'
/*scrivere il numero nella casella */
document.getElementById('noslides').value=activeslide+1
}

function previousslide() {
/*nasconde la slide precedentemente attiva */ 
document.getElementById('slide'+activeslide).style.display='none'
/*cambia la slide attiva*/
if( ! document.getElementById('slide'+ --activeslide) )
activeslide=0
/*far apparire la nuova slide  */ 
document.getElementById('slide'+activeslide).style.display='block'
/*scrivere il numero nella casella */
document.getElementById('noslides').value=activeslide+1
}

function showsubitems(par) 
{
  for (chi=par.firstChild; chi; chi=chi.nextSibling)
    if( chi.nodeName == 'A' )
      if(chi.style.display=='none')
        chi.style.display='block'
      else
        chi.style.display='none'
}

function golink(elselect)
{
/*
number of line
*/

nol=elselect.selectedIndex
if(elselect.options[nol].value!="")
location.href=elselect.options[nol].value
}