Partial view not rendering on ajax post

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MVC

ASP.NET4

I have a Main.cstml which is a normal view inside which I am rendering 2 partial views.

Code for Main.cshtml





Code for Partial1.cshtml

@model PartialViewDemo2.Models.Product
@using (Ajax.BeginForm("Partial1", "Home",
new AjaxOptions()))
{
@Html.TextAreaFor(m => m.Name)
<input type="submit" id="SubmitButton" />
}

Similarly there are some controls on Partial2.cshtml

Code on controller

[HttpPost]
        public ActionResult Partial1(Product product)
        {
            return View(product);
        }

When I click on submit button present on Partial1.cshtml, I want both the views to render, but only Partial1 gets rendered and Partial2 goes off.
I have represented my problem here using a very simple demo. Kindly help.