function switch_freccetta (nome_immagine){
		if (document.getElementById(nome_immagine).alt=='dx') {
			document.getElementById(nome_immagine).alt='giu';
			document.getElementById(nome_immagine).src='imma/freccetta_giu.gif';
		}
		else{
			document.getElementById(nome_immagine).alt='dx';
			document.getElementById(nome_immagine).src='imma/freccetta_dx.gif';
		}
	}

	/***********************************************
	* Switch Content script- © Dynamic Drive (www.dynamicdrive.com)
	* This notice must stay intact for legal use. Last updated Mar 23rd, 2004.
	* Visit http://www.dynamicdrive.com/ for full source code
	***********************************************/
	
	var enablepersist="off" //Enable saving state of content structure using session cookies? (on/off)
	var collapseprevious="no" //Collapse previously open content when opening present? (yes/no)
	
	if (document.getElementById){
		document.write('<style type="text/css">')
		document.write('.switchcontent{display:none;}')
		document.write('</style>')
	}
	
	function getElementbyClass(classname){
		ccollect=new Array()
		var inc=0
		var alltags=document.all? document.all : document.getElementsByTagName("*")
		for (i=0; i<alltags.length; i++){
		if (alltags[i].className==classname)
			ccollect[inc++]=alltags[i]
		}
	}
	
	function contractcontent(omit){
		var inc=0
		while (ccollect[inc]){
		if (ccollect[inc].id!=omit)
			ccollect[inc].style.display="none"
			inc++
		}
	}
	
	function expandcontent(cid){
	if (typeof ccollect!="undefined"){
		if (collapseprevious=="yes")
			contractcontent(cid)
			document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
		}
	}
	
	function revivecontent(){
		contractcontent("omitnothing")
		selectedItem=getselectedItem()
		selectedComponents=selectedItem.split("|")
		for (i=0; i<selectedComponents.length-1; i++)
		document.getElementById(selectedComponents[i]).style.display="block"
	}
	
	function get_cookie(Name) { 
		var search = Name + "="
		var returnvalue = "";
		if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		if (offset != -1) { 
		offset += search.length
		end = document.cookie.indexOf(";", offset);
		if (end == -1) end = document.cookie.length;
		returnvalue=unescape(document.cookie.substring(offset, end))
		}
		}
		return returnvalue;
	}
	
	function getselectedItem(){
		if (get_cookie(window.location.pathname) != ""){
		selectedItem=get_cookie(window.location.pathname)
		return selectedItem
		}
		else
		return ""
	}
	
	function saveswitchstate(){
		var inc=0, selectedItem=""
		while (ccollect[inc]){
		if (ccollect[inc].style.display=="block")
		selectedItem+=ccollect[inc].id+"|"
		inc++
	}
	
	document.cookie=window.location.pathname+"="+selectedItem
	}
	
	function do_onload(){
		uniqueidn=window.location.pathname+"firsttimeload"
		getElementbyClass("switchcontent")
		if (enablepersist=="on" && typeof ccollect!="undefined"){
		document.cookie=(get_cookie(uniqueidn)=="")? uniqueidn+"=1" : uniqueidn+"=0" 
		firsttimeload=(get_cookie(uniqueidn)==1)? 1 : 0 //check if this is 1st page load
		if (!firsttimeload)
		revivecontent()
		}
	}
	
	if (window.addEventListener)
		window.addEventListener("load", do_onload, false)
	else if (window.attachEvent)
		window.attachEvent("onload", do_onload)
	else if (document.getElementById)
		window.onload=do_onload
	
	if (enablepersist=="on" && document.getElementById)
		window.onunload=saveswitchstate