[GeoNetwork-users] how to express the count of related links in search-results.xsl

I edited metadata and added related links under the section of Online resource of Metadata extension info. Now, I want to add a new button "related links" in search result section, so I have to edit search-results.xsl. However, I do not know how to express the conditional test that the count of related links is larger than 1.
Could anybody give me some idea?

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http://kaba.msn.com.cn/?k=1