$WBB{toolbar} accepts a string expression which you use to
define the thing you are adding to the toolbar. Most often
you want to be able to use $ICONURL and $SCRIPTNAME so that
you can display icons and generate links.
This doesn't work:
$WBB{toolbar} =<<EOM
Home qq(<a href="$SCRIPTNAME/Add"><img src="$ICONURL/add.gif"></a>)
EOM
The string expression is evaluated by WODA and the result
is passed back to the toolbar. The variables need to be
protected from the evaluation. This is done by using backslashes.
This works:
$WBB{toolbar} =<<EOM
Home qq(<a href="\$SCRIPTNAME/Add"><img src="\$ICONURL/add.gif"></a>)
EOM
Notice the backslashes protecting the variable symbols!
