Extjs4 the combobox loading along? - combobox

Question

There are two comboboxes, one's data is fixed, the other is request from the servlet with AJAX. If I click the fixed combobox first, the other combobox's data is correctly loading, but if I click the other combobox first, then I click the fixed combobox, the other combobox will be loading along.
var win_form_combox0 = Ext
.create(
'Ext.form.field.ComboBox',
{
flex : 1,
name : 'combox0',
allowBlank : false,
store : Ext
.create(
'Ext.data.Store',
{
model : 'Combox',
proxy : {
type : 'ajax',
url : 'interfaceInfoFindController.do?actionType=FINDTRANSFORMERCOMBOX0'
},
autoLoad : true
}),
editable : false,
displayField : 'displayField',
valueField : 'value',
queryMode : 'local',
value : 'transformer',
listeners : {
select : function(combox) {
win_form_combox1.store.removeAll();
win_form_combox1.store.load();
//win_from_combox1.stopAnimation();
//win_form_combox1.setValue(combox.value);
}
}
});
var win_form_combox1 = Ext
.create(
'Ext.form.field.ComboBox',
{
flex : 2,
name : 'combox1',
margins : '0 0 0 5',
editable : false,
displayField : 'displayField',
valueField : 'value',
queryMode : 'local',
value : false,
store : Ext
.create(
'Ext.data.Store',
{
model : 'Combox',
data : [ {
value : false,
displayField : '请选择'
} ],
proxy : {
type : 'ajax',
url : 'interfaceInfoFindController.do?actionType=FINDTRANSFORMERCOMBOX1'
},
autoLoad : false,
listeners : {
load : function() {
win_form_combox1
.setValue(win_form_combox1.store
.getAt(0).data.displayField);
}
}
}),
listeners : {
select : function(combox) {
win_form_combox2.store.load();
//win_form_combox2.setValue(combox.value);
}
}
});