EXTjs drop-down box

 {
					    fieldLabel: '商家类型',  
						xtype : 'combo',
				        valueField :"typeId",  
			            displayField: "typeName", 
						hiddenName : "pendingApprovalStoreInfo.storeType",
		                mode: 'local',    
		                forceSelection: true,  
			            editable: false,  
			            triggerAction: 'all',  
				        allowBlank:false,  
					    store : typeStore
					}


{xtype : 'combo',fieldLabel : "Product Status",emptyText : "Please select a product status",allowBlank : false,width : 180,mode : 'local',editable : false,forceSelection : true,hiddenName : "goodsInfo. flag",displayField: 'name',valueField:'value',triggerAction:'all',forceSelection:true,store
 : new Ext.data.JsonStore({fields : ['name', 'value'],data : [{name : sysConfig.goods_flag_label_selling,value : sysConfig.goods_flag_selling}, {name : sysConfig.goods_flag_label_sold,value : sysConfig.goods_flag_sold}]})}



 
 {
					    fieldLabel: '商家类型',  
						xtype : 'combo',
				        valueField :"typeName",  
			            displayField: "typeName", 
						hiddenName : "typeId",
		                name : "pendingApprovalStoreInfo.storeType",
		                mode: 'local',    
		                forceSelection: true,  
			            editable: false,  
			            triggerAction: 'all',  
				        allowBlank:false,  
					    name: "storeCode",
					    store : typeStore
					}


 
	//取出每一个storeId值
    	var typeStore = new Ext.data.Store({
                proxy : new Ext.data.HttpProxy({
    				 url : APPNAME + "/storeType_listAll.action"
    			}),
    			reader : new Ext.data.JsonReader({
    				totalProperty : 'totalCount',
					idProperty : 'typeId',
					remoteSort : true,
					root : "types",
					fields : ["typeId", "typeName", "remarks"]
    			}),
    			autoLoad : false
    		});
    	typeStore.load();


 


Query values ​​in the database, and display different descriptions according to different values ​​(for form forms):
 {
					    fieldLabel: '商家类型',  
						xtype : 'combo',
				        valueField :"typeId",  
			            displayField: "typeName", 
						hiddenName : "pendingApprovalStoreInfo.storeType",
		                mode: 'local',    
		                forceSelection: true,  
			            editable: false,  
			            triggerAction: 'all',  
				        allowBlank:false,  
					    store : typeStore
					}




 
	//取出每一个storeId值
    	var typeStore = new Ext.data.Store({
                proxy : new Ext.data.HttpProxy({
    				 url : APPNAME + "/storeType_listAll.action"
    			}),
    			reader : new Ext.data.JsonReader({
    				totalProperty : 'totalCount',
					idProperty : 'typeId',
					remoteSort : true,
					root : "types",
					fields : ["typeId", "typeName", "remarks"]
    			}),
    			autoLoad : false
    		});
    	typeStore.load();