function errorfun(t)
{
    alert('发生错误： ' + t.statusText);
}

//用户登录
function user_login(username, pwd,remember)
{
    if (username.length < 1 || pwd.length < 1)
    {
        alert('请输入用户名或密码');
        return;
    }
	new Ajax.Request('/ajaxphp/loginopt.php',
        {
                parameters: 'u='+username+'&p='+pwd+'&r='+remember,
                method : 'post',
                onFailure:errorfun,
                onSuccess:user_login_suss
        }
   );
}
function user_login_suss(response)
{
	//alert(response.responseText);
	if (response.responseText == 1)
	{
	    var url = './loginspan.php';
			new Ajax.Updater(
				'logindiv',
			  url,
			  { asynchronous:true, method:'get', evalscripts:true}
		  );
	}
	else
	{
		alert(response.responseText);
	}
}
//用户退出
function user_quit()
{
	new Ajax.Request('/ajaxphp/loginopt.php',
        {
                parameters: 'q=quit',
                method : 'get',
                onFailure:errorfun,
                onSuccess:user_quit_suss
        }
   );
}
function user_quit_suss(response)
{
	if (response.responseText == 1)
	{
	    var url = './loginspan.php';
			new Ajax.Updater(
				'logindiv',
			  url,
			  { asynchronous:true, method:'get', evalscripts:true}
		  );
	}
	else
	{
		alert(response.responseText);
	}
}