Google spidering javascript pop-up links?

I didn't think that they spidered javascript links

[Bewenched]

On our website we just recently implemented a javascript pop-up for customers to view larger images of the products without the casual browser or bot eating up bandwidth.

Going through sitemaps I noticed alot of these errors:
URLs restricted by robots.txt (###)

Curious I took a look and the bot had been attempting to spider the pop up page:

code something like this:

<a href="javascript:popupWindow('http://www.mydomain.com/Image-Popup.html') etc..

I thought that bots didn't follow these types of links.

Anyone else noticing this?

[tedster]

For quite a while now, Googlebot will attempt to spider any text string that looks like it might be a url -- even those inside a script and even some we may wish it wouldn't go for. That doesn't necessarily mean that PageRank or link influence is being passed to that url. It just means that Google wants to see if the text string is possibly a url that will resolve.

[shogun_ro]

And he can read text in flash files, swf extensions.including url's.

[Bewenched]

Well .. at least it's a restricted directory, but I hate seeing those sitemaps errors. If it's restricted in robots.txt its not really an error.