passing parameter via javascript

in one frame, javascript opens an xml file in another frame:
<a href="javascript:{parent.right.location.href='file.xml';}>...

However, I want to be able to:
A) pass a parameter that tells whether to transform file.xml with fileA.xsl or fileB.xsl
    and/or
B) pass a parameter that gets passed on to the stylesheet (since I have the xsl file set up to deal with a passed parameter.

Is this do-able?

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