When trying to run the custom_combobox example from zklive website , I always get an error when I try to select an item in the listbox, included into a bandbox.

here is the example

<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk>
<bandbox id="x" name="x">
<bandpopup>
<listbox id="list" width="200px" onSelect="x.setValue(self.getSelectedItem().getLabel());x.close()" name="list">
<listhead>
<listheader label="Name" />
<listheader label="Description" />
</listhead>
<listitem>
<listcell label="John" />
<listcell label="CEO" />
</listitem>
<listitem>
<listcell label="Joe" />
<listcell label="Engineer" />
</listitem>
<listitem>
<listcell label="Mary" />
<listcell label="Supervisor" />
</listitem>
</listbox>
</bandpopup>
</bandbox>
</zk>

here is the error on selection:

Sourced file: inline evaluation of: `` x.setValue(self.getSelectedItem().getLabel());x.close();'' : Attempt to resolve method: getSelectedItem() on undefined variable or class name: self : at Line: 5 : in file: inline evaluation of: `` x.setValue(self.getSelectedItem().getLabel());x.close();'' : self .getSelectedItem ( )