title: Ajax.BeginForm doesn't post properly
body: <p>I have a simple requirement I seem unable to meet: I have a product page.  products have vendors and the vendor input is a text field with an autocomplete.  if the user enters a vendor that doesn't exist in the database, I need to add it.  to add it I have a DIV on the page which I .load() with a call to my /Vendor/Create controller method.  the view for that method uses:</p>
  
  <pre><code>@using (Ajax.BeginForm("Create", "Vendor", new AjaxOptions {
       UpdateTargetId = ViewBag.TargetId,
       HttpMethod = "Post", 
       OnSuccess="VendorCreated", 
       OnComplete="alert('success')"
  })) {
  </code></pre>
  
  <p>which should post my form via ajax, calling Javascript when done.  The problem I'm having is that upon submission my whole page gets refreshed such that I end up with /Vendor/Create when I started with /Product/Create.  additionally, neither the OnSuccess nor OnComplete get called.</p>
  
  <p>what am I doing wrong here?</p>