Shifting focus between the multiple Windows

<SCRIPT>

mapWindow = open('barnum.gif', 'mapWin',
                                 'toolbar=yes,scrollbars=yes,width=300,height=300')

dirWindow = open('dir.htm', 'dirWin', 'width=225,height=200')

</SCRIPT>

<A HREF="javascript:void('')" onMouseOver="mapWindow.focus()">
Look at the map
</A>

<A HREF="javascript:void('')" onMouseOver="dirWindow.focus()">
Look at the directions
</A>