Splitting a relative link in 2 parts

Could anyone help me with this? I need to split a parameter like:
/careers/sites/en/page.htm
in 2 parts. I want to get the following results:
1: /careers/sites/en
2: page.htm

The parameter is send to a template using xsl:call-template and
xsl:with-param. I think this shouldn't be to difficult, but I can't seem to figure this
out. 

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