What do you mean the <input>s aren't in the source? Are you refering to the server-side ASP code? In that case you should view-source from your browser to get a better picture of what you are dealing with.
Extract from example 1: 
            <div id="UpdatePanel1">
    
                   <fieldset>
                   <legend>UpdatePanel content</legend>
                    <!-- Other content in the panel. -->

                    1/5/2008 10:21:20 PM
                    <br />
                    <input type="submit" name="Button1" value="Refresh
+ Panel" id="Button1" />
                    </fieldset>
                
</div>

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In reply to Re^3: IE Automation with Update Panel by plobsing
in thread IE Automation with Update Panel by taj

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