function loginCheck(){
    var loginName = document.getElementById("loginName").value;
    var loginPassword = document.getElementById("loginPassword").value;
    var dataString="loginName="+loginName+"&loginPassword="+loginPassword;
    $(".responceMsg").text("");
    $.ajax
    ({

        type: 'POST',
        url: '/instacheckinRegistration',
        data: dataString,
        success:function(data)
        {
            data = $.trim(data);
            if(data=="ok")
            {
                $("#loginPopUp").dialog('close');
                window.location.reload(true);
            //return true;
            }
            else{
                $(".responceMsg").text(data);
            }
        },
        error: function() {
            alert("error");
        }
    });
}