You can create a similar effect using layers in Dreamweaver. Simply place a layer into your page (Insert menu/Layout Objects, Layer)
Click on the box in the upper left corner of the new layer. Then take a look at the Properties palette at the bottom. There you will find an Overflow field. Set that to Scroll and you are all taken care of. The content on the page that is visible will be controlled by the size of the layer bounding box. Any extra content in the box will be controlled by the Overflow setting.
