ASP.NET Web Forms jQuery Update Progress without ASP.NET Update Panle or Script Manager

On my contact page I have some validation under submit click. When submit button click I want to show update progress on my contact form. Can I do it without using Asp.net update panel or script manager.

Update panel and script manager load another 300KB. It makes the page slow.

What should I do?

I have used jQuery validation and after validation i have used the code below:

$.ajax({ 
    type: "POST", 
    url: "", 
    data: "{}", 
    contentType: "application/json; charset=utf-8", 
    dataType: "json", 
    async: true, 
    success: function (msg) { 
        $("#progressbar").html(""); 
        $("#result").text(msg.d); 
        clearInterval(intervalID); 
    } 
});

Your situation sounds fairly standard, and I agree with jeschafe that 300k shouldn't cause any noticable slowdown. I believe that using an update panel in this case is the correct choice, however you can write your own solution doing something like this:

Create a page method where you will perform your validation and use jQuery to serialize your form and make an ajax call to the page method (Example Here). You can use a loading gif from a site like this and display it while you are waiting for the response, if the validation process is going to take a while.