You have some extra stuff (red):
Code:
<a href="images/exthouse1.jpg" rel="lightbox" title= "title" onmousedown="this.title='<a target=\'_blank/\' href=\'http://www.google.com/\'>Google</a>';" onmouseout="this.title='';">
<img src="images/exthouse1thumb.jpg" width="100" height="100" alt="" border="8" style="border-style: solid; border-color: #BCAB77" /></a>
I don't think it will hurt anything. But, if you lost the space after, it would. Best to get rid of it. As for your question, you can just add any text in there that you like (showing only the onmousedown - that's all that changes):
Code:
onmousedown="this.title='For more info, try: <a target=\'_blank/\' href=\'http://www.google.com/\'>Google</a>, they\'re great!';"
Be sure to continue escaping single quotes/apostrophes (') as shown.
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