$(function() 
{
    $('#h-login-submit').click(
        function()
        {
            $.ajax({
               type: "POST",
               url: "http://www.china-loongs.com/login.php",
               data: "name=John&location=Boston",
               async: false,
               dataType: 'json',
               success: function(json){
                 alert( json );
               },
               error: function(){alert(('请输入正确的用户名或者密码'))}               
            });
        }
    );

});