Enlarging image in same window

I am just starting to make my own website and I think there is HTML code which will enable a thumbnail when clicked to open a larger image in the same window rather than taking the viewer off site. Any help would be gratefully appreciated

http://www.cssplay.co.uk/menu/magnify
http://www.huddletogether.com/projects/lightbox2/

Thanks Fang

Fancy Zoom

Check it out on this guy's blog... click on any one of his stock charts...

http://www.etftrends.net

Fancy zoom will automatically do that any time it sees a hyperlink pointing to an image file.

Now, if you want to do that with text too, this script was modified:
http://static.railstips.org/orderedl...y-zoom-jquery/