title: richfaces datatable row configuration
body: <p>I am using rich faces data table tag in my jsf:</p>
  
  <pre><code>&lt;r:dataTable id="dataTable" var="user" preserveDataModel="false"
  
                  value="#{ListUsersManagedBean.users}" rows="10"
                  rowId="#{user.firstName}" rowKeyVar="index"
  
                  width="500" style="float:centre" reRender="ds" columnClasses="center"&gt;
  </code></pre>
  
  <p>Here i have configured rowsize as 10 in static way.I want to give the user a dropdown in the table so he can select number of rows  100,200,300,400 etc below the column.How can i do this.Or any better solution?</p>
  
  <p>Thanks</p>