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If you mean javascript forms, the answer is usually no. However, I have heard there are a few cgi bin forms that a search engine is able to crawl, although, I have not personally used them.
The best bet is to put plain text links somewhere on the page...or, submit the site map page to the engine. That way, you know that the spider can get to all of your pages.
<form name="form2">
<select name="menu1" onChange="MM_jumpMenu('parent',this,0)">
<option value="http://www." selected>
NURSES</option>
<option value="http://www.">JOIN</option>
<option value="http://www.">MEMBERS</option>
<option value="http://www.">TOUR</option>
<option value="http://www.">LINKS</option>
<option value="http://www.">WEBMASTERS</option>
</select>
</form>