There won't be a penalty. But the question of whether or not the text is visible to search engines depends on how it pops up i.e. title attribute? JavaScript? AJAX?
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Posts made by NickPateman81
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RE: Is there an SEO penalty for text that appears only in a pop-up box when you hover the mouse over an icon?
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RE: How do you visualize website structure
Apart from everything mentioned already - bubbl.us is a great free online tool that lets you save and export your visualisations.
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RE: .Co Domains - Any thoughts?
.co is the ccTLD for Colombia. It was packaged up by Godaddy as a TLD for 'Companies' 'Communities' 'Corporations' and other things that it doesn't represent. Buying a .co ccTLD and trying to rank in Google.com is like buying a .au ccTLD and trying to rank in .Google.com. If I had the choice between .info and .co I would go with .co for branding reasons and .info for SEO reasons. Why for SEO? Because I've seen and worked with companies that have acheived with .info but yet to do so with .co. Search "William Shakespeare" for example and look at the .info outranking the .edu's.
If I want to rank globally I'd have to pick gTLD over ccTLD but I definitely feel like I'm going against the grain here! Who's with me!?