Something

  		<script language="javascript">
		// <![CDATA[
			function pulldownChanged(){
			    clear_form();
       			document.forms['form'].elements['autoScroll'].value=getScrolling();
       			document.getElementById("form:nonclearingRefreshButton").click();
			}
		// ]]>  
		</script>


            <h:selectOneRadio id="newConstructionInput"
				value="#{dataModel.newConstruction}"
		  		onchange="pulldownChanged()"
				layout="lineDirection"
				styleClass="selectOneRadio"
				>


		<!-- non-clearing refresh button; JSF will see it as refreshButton  -->
		<f:verbatim>
		    <input type="submit" style="display: none;" value="Submit" name="form:refreshButton" id="form:nonclearingRefreshButton"/>
		</f:verbatim>
		
		<!-- never used directly; refreshButton exists so verbatim html above can imitate it -->
		<h:commandButton id="refreshButton"
		    value="Submit" action="#{page.refresh}"
		    style="display:none">
		</h:commandButton>