function checkLog(theForm) {
	var chiave_reg_exp = /[a-zA-Z0-9]/;
	var result = true;

	if ((theForm.username.value==0) && (theForm.username.value.length<=0)) {
		result = false;
	}
	else if (!chiave_reg_exp.test(theForm.username.value)){
		result = false;
	}
	else if ((theForm.password.value==0) && (theForm.password.value.length<=0)) {
		result = false;
	}
	else if (!chiave_reg_exp.test(theForm.password.value)){
		result = false;
	}
	
	if (result){
		var user = $("#username").val();
		var pass = $("#password").val();
		$.post("login.asp",{ username: user, password: pass },function(data){
			var esito = data;
			if (esito=="false"){
				$("#msg_err").html("user o password errati !");
			}
			else{
				$("#login").hide(1200);
				setTimeout(function() { 
					$("#headright").load("utentimenu.asp?logIt=1");
				}, 1300);
			}
		});
	}
}

function logout(){
	$("#menu_ut").hide(1200);
	setTimeout(function() { 
		$.get("logout.asp");
		$("#headright").load("loginbox.asp");
	}, 1300);
}