<zk>
       <spinner onChange='msg.value = "spinner: "+new Date();' />
       <timebox onChange='msg.value = "timebox "+new Date();' />
       <combobox onChange='msg.value = "combobox "+new Date();' />

       <separator></separator>
       <label id="msg" />

       <listbox width="350px">
               <listitem>
                       <listcell>
                               <spinner
                                       onChange='lc1.label = event.value' />
                       </listcell>
                       <listcell id="lc1"/>
               </listitem>
               <listitem>
                       <listcell>
                               <timebox
                                       onChange='lc2.label = event.value' />
                       </listcell>
                       <listcell id="lc2"/>
               </listitem>
               <listitem>
                       <listcell>
                               <combobox
                                       onChange='lc3.label = event.value' />
                       </listcell>
                       <listcell id="lc3"/>
               </listitem>
       </listbox>
</zk>