function txtdesc(i, pref, max, curs){
var el
curs=(curs>'')?curs:"hand"
for (j=0; j<=max; j++) {
  el=document.getElementsByName(pref+j)
  for (h=0; h<el.length; h++) {el[h].className = "nascosto"};}
el=document.getElementsByName(pref+i)
for (h=0; h<el.length; h++) {el[h].className = "visibile"}
sorgente=event.srcElement
sorgente.style["cursor"]=(i==0)?"auto":curs
}    

function chgcurs(i)
{
sorgente=event.srcElement
sorgente.style["cursor"]=(i==0)?"auto":"hand"
}

function chgenabled(nome, elemento)
{
var y=document.getElementById(elemento)
var x=document.getElementById(nome)
if (y.options[y.selectedIndex].index==1)
   {x.disabled=false}
else
   {x.selectedIndex=0; x.disabled=true}
}

function disabilita(nome)
{
var x=document.getElementById(nome)
x.disabled=true
}