About once every 20 milliseconds or so, some html author on the Web asks the question "Is there any way to put a 'Back' button on my page that will take you back to wherever you came from?" Until JavaScript the answer was no but now it's pretty simple to do.
Here are two ways to create a go-back button. This one uses a form to get a real-looking button:
This example uses a standard html link format, but specifies some JavaScript code instead of a destination page. You could just as easily put a bitmap in place of the text here.