1 var items2=[combo_continent,[color=red]getComboRegions[/color]("region")//1.这里是第一个区域下拉框(表示国家)——该下拉框没有显示对应的数据？把参数改成和下拉框2一样的shipRegion之后，下拉框项就不显示了~{
 2             fieldLabel:'省份',
 3             name:'province'
 4         },{
 5             fieldLabel:'城市',
 6             name:'city'
 7         },{
 8             xtype: "textarea",
 9             fieldLabel:'街道地址',
10             name:'address',
11             width:200,height:40
12         },{
13             xtype:'numberfield',
14             fieldLabel:'邮编',
15             name:'zip'
16         },{
17             fieldLabel:'电话',
18             name:'phone'
19         },{
20             fieldLabel:'传真',
21             name:'fax'
22         },{
23             xtype:'displayfield',
24             value:'寄货地址信息'
25         },getComboRegions("shipRegion"),{ //2.这里是第二个下拉框——该下拉框显示数据正常！！
26             fieldLabel:'省份',
27             name:'shipProvince'
28         },{
29             fieldLabel:'城市',
30             name:'shipCity'
31         },{

 1 var comboRegions={};  //1.定义一个对象
 2 function getComboRegions(field){
 3     if(field==null){
 4         field='region';
 5     }
 6     if(! comboRegions[field]){   //2.  a.这里又怎么是数组？（有点不明白……） b.第一次判断条件是真，执行if包含的代码块；第二次为假~
 7         var storeRegions=new Ext.data.SimpleStore({
 8             fields:[ {name:'key' }, {name: 'value'} ]
 9         });
10         storeRegions.loadData(regions);
11         comboRegions[field]=new Ext.form.ComboBox({
12             typeAhead: true,
13             editable : false, 
14             fieldLabel:'区域',
15             lazyRender:true,
16             triggerAction: 'all',
17             mode:'local',
18             hiddenName:field,
19             store: storeRegions,
20             valueField: 'key',
21             displayField: 'value',
22             /*VAR*/
23             emptyText:'请选择',
24             allowBlank:false
25         });
26     }
27     return comboRegions[field];
28 }