function login()
{
	$username = $('login_usr').value;
	$password = $('login_pwd').value;
	
	if ($username.trim() == "" || $password.trim() == "")
	{
        alert("inserire username e password");
		return;
	}
	
	window.location.replace('login.php?login_username=' + $username + '&login_password=' + $password);
	
}


function login_key(ev)  
{
    if(window.event)  
	{
	    if (event.keyCode == 13)  
		{
		    login();
		}	           
    }
	else  
	{
	    if(ev.which == 13)    
		{
		    login();
		}
    }
}	


function logout()
{
	 if (confirm("uscire?"))
	     window.location.replace('logout.php');
}


function carrello()
{
    window.location.replace('carrello.php');
}