ns6_index=0

function change(e){

  if(!document.all&&!document.getElementById)
     return

  if (!document.all&&document.getElementById)
    ns6_index=1

  var source=document.getElementById&&!document.all? e.target:event.srcElement
  if (source.className=="folding"){
    var source2=document.getElementById&&!document.all? source.parentNode.childNodes:source.parentElement.all
    if (source2[2+ns6_index].style.display=="none"){
       source2[0].src="images/btnMinus.gif"
       source2[2+ns6_index].style.display=''
     }
    else{
       source2[0].src="images/btnPlus.gif"
       source2[2+ns6_index].style.display="none"
       // aClick.push("Pippo") 
    }
   }

  // extension by Fabio Pintore 
  if (source.className=="Mfolding"){
    var source2=document.getElementById&&!document.all? source.parentNode.childNodes:source.parentElement.all
    source2[2+ns6_index].style.display=''
    source2[0].src="images/btnMinus.gif"
    source.parentNode.display=''

    // load and execute the .php on TransTree frame with a parameter ID
    // if you like you can load an .asp application instead of php application 
    window.top.TransTree.location="example01_02.php?ID="+source.parentNode.id
   }

}

document.onclick=change