[xsl] testing for position of an element and displaying it accordingly

[ms <mina_hurray@xxxxxxxxx>]

Hi all:

My input XML looks like this;

<r1>
<a>test</a>
<a>test2</a>
<b>test test</b>
<a>test3</a>
</r1>

For this XML, I would like to write an XSLT which
basically achieves the following:

1) For the <a> elements which are above the <b>
element, they should be displayed this way:

Test
Test2
1)test test

2) For the <a> element which appears after the <b>
element, I want it displayed after the <b> element:

Test
Test2
1)test test
test3

How can I achieve this in XSLT?  I tried testing the
position, using position()=1. This works obviously for
the first <a> element and fails for the second one. 

Please let me know if this is possible? 


 
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