Last year I wrote this piece on the use of lightbox javascript for websites. Lightbox is a beautiful piece of code that makes your images open in overlays instead of a blank page. The code is so wellmade, you only have to add it to the headers of your website in order to load and you can immediately start using it. Thickbox is another piecs of beautiful code I just implemented on a client's website. Thickbox is similar to lightbox, but thickbox can do more than images : it can call virtually anything in an overlay window.

• ThickBox will resize images that are bigger than the browser window.
  


• ThickBox offers versatility (images, iframed content, inline content, and AJAX content).
  


• ThickBox will hide form elements in Windows IE 6.
  


• ThickBox will remain centered in the window even when the user scrolls the page or changes the size of the browser window. Clicking an image, the overlay, or close link will remove ThickBox.(ThickBox website)