jQueryUI - tabs usage

jQueryUI - tabs usage

I'm pretty new on programming trying to create web application which can
change the content without loading the menu all over again.
Then i decided to use vertical jqeury-ui tabs as a navigator. Using this code
<div id="tabs">
<ul>
<li><center>Market Data</center></li>
<li><a href="t1.htm">For Test 1</a></li>
<li><a href="t2.htm">For Test 2</a></li>
<li><a href="t3.htm">For Test 3</a></li>
</ul>
</div>
The question is this "tabs" of jquery-ui using what mechanic for
displaying another htm file inside it AJAX, iframe or what?
Is this a good approach?
And can it handle a complex htm file that involve submit the form, receive
a data from web service?
Thank you in advance !