Possible Duplicate:
jQuery and SEO (hidden div's)
What if I added a hidden div tag inside it some content text, does search engines look into this div?
Example:
<div style="display:none">some text</div>
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It will be indexed but can be frowned upon by Google if you are hiding/showing content for SEO reasons. In other words, what Google sees should be what the user sees when clicking the link.
have a look on this discussion at google form:
http://groups.google.com/group/Google_Webmaster_Help-Indexing/browse_thread/thread/fd91a80997e531b2/e0fe0c574aa44b8d?lnk=gst&q&pli=1
https://support.google.com/webmasters/answer/66355?hl=en
Hope this helps.