级联

$('#aa').combobox({
url: '',
method: 'get',
textField: 'd',
valueField: 'e',
panelHeight: 'auto',
onSelect: function (date) {
$('#bb').combobox({
url: '  ?id=' + date.e,
textField: 'e',
valueField: 'd',
panelHeight: 'auto'
}).combobox('clear');
}
});
$('#bb').combobox({
textField: 'e',
valueField: 'd',
panelHeight: 'auto'
});