jquery - Lookup values on change
<p>I want to post back to the server to run a lookup function.  So when a user types their email address into a textbox and "clicks out" I want to call my C# function:</p>

<pre><code>UserInfoObject LookupUserInfo(string Email)
{
  //...
} 
</code></pre>

<p>My jQuery abilities are not very good.  So, I could use some help setting up the basic structure.  The <a href="http://api.jquery.com/category/ajax/" rel="nofollow">API</a> is overwhelming.  Do I need ajax? Custom AJAX seems a little too advanced for my skill level.</p>

<p>In my overly simplistic view:</p>

<pre><code>$('#textBox').OnChange(function {
    //call some C#

    //Use object info to populate textbox2 and textbox3
}
)};
</code></pre>
