If you use Prototype, you'll want to look at the API docs for document.viewport and getHeight -- http://www.prototypejs.org/api/document/viewport http://www.pr

If you use Prototype, you'll want to look at the API docs for document.viewport and getHeight -- http://www.prototypejs.org/api/document/viewport http://www.prototypejs.org/api/document/viewport -- http://www.prototypejs.org/api/element/getheight http://www.prototypejs.org/api/element/getheight