function login_form() {
	document.getElementById('global_login').style.display = 'block';
}
function cancel_login() {
	document.getElementById('global_login').style.display = 'none';
	document.location.reload();
}
function welcome_end() {
	document.getElementById('global_welcome').style.display = 'none';
	document.location.reload();
}
function global_log() {
	var username = $F('username');
	var password = $F('password');	
	
	if (username == '') {
		document.getElementById('login_response').innerHTML = 'Введите свой логин!';
	}
	else if (password == '') {
		document.getElementById('login_response').innerHTML = 'Введите свой пароль!';
	}
	else {
	
		document.getElementById('login_process').innerHTML = '<img src="http://usovi.com.ua/images/load.gif" />';
		var url = 'http://usovi.com.ua/ajax/global_login.php';
		var pars = '?username=' + encodeURIComponent(username) + '&password=' + encodeURIComponent(password);
		
		var myAjax = new Ajax.Request(
			url, 
			{
				method: 'get', 
				parameters: pars, 
				onComplete: global_logResponse
			});
	}
}

function global_logResponse(originalRequest)
{
	var response = originalRequest.responseText;
	var login_response = $('login_response');
    document.getElementById('login_process').innerHTML = '';
	
	  if (response == 'notok') {
		login_response.innerHTML = 'Неправильный логин или пароль!';
	  }
	  else {
		login_response.innerHTML = 'Входим в систему...';
		document.getElementById('global_login').style.display = 'none';
		document.getElementById('username_response').innerHTML = 'Привет, '+response+'!';		
		document.getElementById('global_welcome').style.display = 'block';		
	  }
		
}