Here are a couple of examples.

For : http://www.flyertalk.com/smile.gif
For : http://www.flyertalk.com/biggrin.gif
For : http://www.flyertalk.com/tongue.gif
For : http://www.flyertalk.com/rolleyes.gif

You get those by right-clicking the smilie and choosing "Copy image location" (ir similar).

Or, as suggested, you can right-click the smilie and save it as a .gif file and insert that file as needed in your email program (or Word document or whatever), or, as also mentioned, simply right clicking and copying the image itself (not the image location) and pasting that should work in most programs.