That's what JavaScript is here for. It provides a nice little property called onMouseOver. This lets you specify what action to take when your mouse is positioned over a link. Pretty handy little bugger, you might think. The problem is that it interferes with the status bar, which is generally considered bad style, violates the Netiquette and is plain intrusive.
Many people regard the status bar as their very private affair, and rightfully so.
We've tried to leave the status bar as unharmed as possible. We have managed doing so with Netscape 3. We'll use the defaultStatus property to achieve this. That's the first thing we have to do. Now you only need to add an onMouseOver statement to all the links you want.