Cannot save image from webpage

[chuckee]

Hi,
I am trying to save the logo from the top-left of the Delta Airlines website, but cannot do it as there is no 'Save Picture As...' option that appears when I right-click the image in IE.
I cannot save it in Firefox either.
Apologies for mentioning the website, but I don't know if anyone would be able to help if I didn't, and I haven't put any links in my post.
Any ideas?

Cheers

[jessejump]

FireFox: Tools > Page Info > Media

[rocknbil]

It's probably because the image is assigned as a background image in CSS.

[chuckee]

Thanks jessejump - that was very useful!