function getCookie(name) {
  	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}


function logged()
{
var miocookie = getCookie("log");
//alert(miocookie);
	if(miocookie != null)
	{
		document.getElementById("login").className = "nascondi";
		document.getElementById("logout").className = "visualizza";
		document.getElementById("benvenuto").innerHTML =miocookie;
	}
	else
	{
		document.getElementById("login").className = "visualizza";
		document.getElementById("logout").className = "nascondi";
	}
}