// VERIFICA E-MAIL
function isEmail(what)
{
   var i=new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
   if(!i.test(what)) {return false};
   return true;
}
<!--
function controllamail(theForm)
{
if (theForm.email.value == "")
  {
	alert("Inserire un valore per il campo \"E-Mail\".");
	theForm.email.focus();
	return (false);
  }
if (!isEmail(theForm.email.value))
  {
	alert("L' \"E-Mail\" non è corretta.");
	theForm.email.focus();
	return (false);
  }
return (true);
}
<!--
function MM_openBrWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}




 function MM_jumpMenu(targ,selObj,restore){ //v3.0
			   alert(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
			   //eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
			   if (restore) selObj.selectedIndex=0;
			 }





function finestra(url,wt,ht) 
{ 
 
var winl = (screen.width-391); 
var wint = 100; 
settings='height=' + ht + ',width=' + wt +',top=' + wint + ',left=' + winl +',scrollbars=yes,toolbar=0,location=0,status=0,menubar=0,resizable=0,dependent=0,copyhistory=0' 

{ 
Myfin = window.open(url,"scheda",settings);
Myfin.focus();



} 
}



/***********************************************
* Dynamic Ajax Content
***********************************************/

var bustcachevar=0 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadedobjects=""
var rootdomain="http://"+window.location.hostname
var bustcacheparameter=""

function ajaxpage(url, containerid){


var page_request = false
if (window.XMLHttpRequest) // if Mozilla, Safari etc
page_request = new XMLHttpRequest()
else if (window.ActiveXObject){ // if IE
try {
page_request = new ActiveXObject("Msxml2.XMLHTTP")
} 
catch (e){
try{
page_request = new ActiveXObject("Microsoft.XMLHTTP")
}
catch (e){}
}
}
else
return false
page_request.onreadystatechange=function(){
loadpage(page_request, containerid)
}
if (bustcachevar) //if bust caching of external page
bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
page_request.open('GET', url+bustcacheparameter, true)
page_request.send(null)
}

function loadpage(page_request, containerid){
if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
document.getElementById(containerid).innerHTML=page_request.responseText
}

function loadobjs(){
if (!document.getElementById)
return
for (i=0; i<arguments.length; i++){
var file=arguments[i]
var fileref=""
if (loadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
if (file.indexOf(".js")!=-1){ //If object is a js file
fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", file);
}
else if (file.indexOf(".css")!=-1){ //If object is a css file
fileref=document.createElement("link")
fileref.setAttribute("rel", "stylesheet");
fileref.setAttribute("type", "text/css");
fileref.setAttribute("href", file);
}
}
if (fileref!=""){
document.getElementsByTagName("head").item(0).appendChild(fileref)
loadedobjects+=file+" " //Remember this object as being already added to page
}
}
}

function getById(id) { 
	return document.getElementById?document.getElementById(id):(document.all?document.all(id):null); 
	}

function hideDiv(id) { 
	getById(id).style.visibility = "hidden";        
	getById(id).style.display = "none"; 
	}
	
function showDiv(id) {
	getById(id).style.visibility = ""; 
	getById(id).style.display = ""; 
}

function trova_marca(selObj) {
theStr ='<img src="/images/trasp.gif" width="1" height="12">';
document.getElementById('modello_form').innerHTML=theStr;
var marca_form=selObj.options[selObj.selectedIndex].value;
ajaxpage('/ajax_mod.php?op=cerca_modello&marca_form=' + marca_form + '', 'modello_form');
}

function trova_modello(selObj) {
theStr ='<img src="/images/trasp.gif" width="1" height="12">';
document.getElementById('info_form').innerHTML=theStr;
var modello_form=selObj.options[selObj.selectedIndex].value;
ajaxpage('/ajax_mod.php?op=info_form&marca_form=' + marca_form + '&modello_form=' + modello_form + '', 'info_form');
}


 function MM_jumpMenu(targ,selObj,restore){ //v3.0
			   eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
			   if (restore) selObj.selectedIndex=0;
			 }
			 
			  function MM_jumpMenu_price(targ,selObj,restore){ //v3.0
			   eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
			   if (restore) selObj.selectedIndex=0;
			 }




function showThis(id){
	for (var i = 1; i <= 2; i++) {
          hideDiv(i + '_home');
     }
	showDiv(id);
}

function reset_moto(){
	var selMarca = document.getElementById("marca_form");
	var selModello = document.getElementById("tmp");
	
	selMarca.selectedIndex = 0;
	selModello.selectedIndex = 0;
}