Like Listhead, each listbox has at most one Listfoot.

<window title="listbox demo" border="normal">
        <listbox id="box" width="250px">        
            <listhead sizable="true">            
                <listheader label="name" sort="auto"/>                
                <listheader label="gender" sort="auto"/>                
            </listhead>            
            <listitem>            
                <listcell label="Mary"/>                
                <listcell label="FEMALE"/>                
            </listitem>            
            <listitem>            
                <listcell label="John"/>                
                <listcell label="MALE"/>                
            </listitem>            
            <listitem>            
                <listcell label="Jane"/>                
                <listcell label="FEMALE"/>                
            </listitem>            
            <listitem>            
                <listcell label="Henry"/>                
                <listcell label="MALE"/>                
            </listitem>            
            <listfoot >            
                <listfooter><label value="This is footer1"/></listfooter>                
                <listfooter><label value="This is footer2"/></listfooter>                
            </listfoot>            
                </listbox>                
</window>