is this what your looking for:
<xp:pager layout="Previous Group Next" id="pager1" for="repeat1"
partialRefresh="true" partialExecute="true">
</xp:pager>
<xp:repeat id="repeat1" value="#{javascript:return new Array(50);}" rows="10">
<xp:label value="#{javascript:new Date().getTime()}"></xp:label>
<xp:br></xp:br>
</xp:repeat>