By default the back link script creates a hyperlink. If you prefer you can create a back button instead, set the type property of your backlink object to button, like this:
<SCRIPT TYPE="text/javascript">
<!--
var gb = new backlink();
gb.type = "button";
gb.write();
//-->
</SCRIPT>
which gives us this button:
Be sure to set the type property before calling the write() method.
By default the button type of back link writes out
<FORM> and
</FORM>
tags. If you use this type of back link inside a form then set the form property to false before calling write():
<SCRIPT TYPE="text/javascript">
<!--
var gb = new backlink();
gb.type = "button";
gb.form=false;
gb.write();
//-->
</SCRIPT>