function validaLogin(){
	var username=document.login.username;
	if(username.value==""){
		alert('Inserire il nome utente');
		return false;
	}
	var password=document.login.password;
	if(password.value==""){
		alert('Inserire la password');
		return false;
	}
}
function registrati(){
	window.location.href='sel_registrazione.php';
}

function loadBanners(tipo,contenitoreBanner){
	if (window.XMLHttpRequest)
		{// code for IE7+, Firefox, Chrome, Opera, Safari
		 xmlhttp=new XMLHttpRequest();
		}
	else
		{// code for IE6, IE5
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
			xmlhttp.onreadystatechange=function()
		{
			if (xmlhttp.readyState==4 && xmlhttp.status==200)
				{
					document.getElementById(contenitoreBanner).innerHTML=xmlhttp.responseText;
				}
			}
		xmlhttp.open("GET","http://www.romatimbri.it/v2/incBanner.php?tipo="+tipo,false);
		xmlhttp.send();
}