function check(){
	if(document.form_arearis.login.value == ""){
		alert("Inserire lo username");
		document.form_arearis.login.focus();
		return;
	}
	if(document.form_arearis.password.value == ""){
		alert("Inserire la password");
		document.form_arearis.password.focus();
		return;
	}
	document.form_arearis.submit();
}