I like it how in some websites you click on an image and it loads it up in the same page. For example, if you click go here (just as an example):
And click on one of the images (attachments) it loads it in the same window while the background goes black. Does anyone know what programming language this was written in? Is it called anything? Any tutorials on how to do it?
P.S. Sorry if this was posted in the wrong section.