function Controllo(){
	
	if(document.getElementById("username").value==""){ 
		document.getElementById("username").style.borderColor = "#ff0000";
		return false;
	}
	if(document.getElementById("password").value==""){ 
		document.getElementById("password").style.borderColor = "#ff0000";
		return false;
	}
	
	document.myForm.action = "login.php";
    document.myForm.submit();

}