怎么调用Ext.onReady中的insertImages()方法？？？

Ext.onReady(function(){
   Ext.QuickTips.init();
   var store = new Ext.data.JsonStore({
       url: '/RTXWH/servlet/DataViewImages',
       root: 'images',
       fields: ['name', 'url', {name:'size', type: 'float'}]
   });
   store.load();

       var tpl = new Ext.XTemplate(
    '<tpl for=".">',
               '<div class="thumb-wrap" id="{name}">',
        '<div class="thumb"><img src="{url}" title="{name}"></div>',
        '<span class="">{shortName}</span>',
        '<span>{sizeString}</span>',
        '</div>', 
           '</tpl>',
           '<div class="x-clear"></div>'
    );
    
       var customEl;
       var ResizableExample = {
           init: function(){
               var custom = new Ext.Resizable('custom', {
                   wrap:true,
                   pinned:true,
                   minWidth:50,
                   minHeight: 50,
                   preserveRatio: true,
                   handles: 'all',
                   draggable:true,
                   dynamic:true
               });
               customEl = custom.getEl();
               document.body.insertBefore(customEl.dom, document.body.firstChild);
               
               customEl.on('dblclick', function(){
                   customEl.hide(true);
               });
               customEl.hide();
               
           }
       };

       Ext.EventManager.onDocumentReady(ResizableExample.init, ResizableExample, true);
    
    var dataview = new Ext.DataView({
           store: store,
           id: "dv",
           tpl: tpl,
           autoHeight:true,
           multiSelect: true,
           overClass:'x-view-over',
           itemSelector:'div.thumb-wrap',
           emptyText: 'No images to display',

           plugins: [
               new Ext.DataView.DragSelector()
           ],

           prepareData: function(data){
               data.shortName = Ext.util.Format.ellipsis(data.name, 15);
               data.sizeString = Ext.util.Format.fileSize(data.size);
               return data;
           },
           
           listeners: {
            selectionchange: {
            fn: function(dv,nodes){
            var l = nodes.length;
            var s = '';
            panel.setTitle('图片列表 ('+l+' 项'+s+' 被选中)');
            }
            },
            'dblclick': function(){
                var selNode = dataview.getSelectedNodes()[0];
           
                var i = document.getElementById("custom");
                i.src = "Upload/" + selNode.id;
                
                customEl.center();
                   customEl.show(true);
            }
           }
       });

       var panel = new Ext.Panel({
           id:'images-view',
           frame:true,
           width:535,
           autoHeight:true,
           collapsible:true,
           layout:'fit',
           title:'图片列表(0 项 被选中)',
           tbar:[
               {text: "添加图片", handler: insertImages}, "-",
               {text: "删除图片", handler: deleteImages}
           ],
           butttonAlign: "left",
           tools: [{
               id:"refresh",
               qtip:"刷新图片列表",
               on:{click:function(){
                    panel.body.mask("加载中...", 'x-mask-loading');
                    
                    setTimeout(function(){
                        store.reload();
                        panel.body.unmask();
                    }, 1000);
                }
               }
           }],
           items: dataview
       });
       panel.render(Ext.getBody());
       
       function insertImages()
       {
           dialog = new Ext.ux.UploadDialog.Dialog({
                 url: '/RTXWH/servlet/Upload',
          width : 450,
          height : 300,
          minWidth : 450,
          minHeight : 300,
          draggable : true,
          resizable : true,
          modal: true,
                 reset_on_hide: false,
                 allow_close_on_upload: false,  
                 upload_autostart: false 
               });
               
           dialog.show('show-button');
       }
       
       function deleteImages()
       {
           var count = dataview.getSelectionCount();
           var nodes = "";
           
           if(count == 0)
           {
               Ext.Msg.show({
                   title:"提示框",
                   msg:"请选择要删除的图片",
                   buttons:Ext.MessageBox.OK , 
                   icon:Ext.MessageBox.INFO
               });
               
               return false;
           }
           
           for(var i = 0; i < count; i++)
           {
               nodes += dataview.getSelectedNodes()[i].id;
               if(i < count -1){
                nodes += ",";
               }
           }
           Ext.Msg.confirm("提示框","你确认删除所选图片吗",function(button){ 
               if (button == "yes")
               {
                   Ext.MessageBox.show({
                       msg:"删除中,请等待...",
                       progress:true,
                       progressText: '删除中...',
                       width:300,
                       wait:true,
                       waitConfig:{
                             interval:100,
                             duration:1000,
                             fn:function(){
                                 Ext.Ajax.request({
                                     url: "/RTXWH/servlet/DeleteImages",
                                     params: {
                                         "Nodes": nodes
                                     },
                                     callback: function(options, success, response)
                                     {
                                         if(success)
                                         {
                                              Ext.Msg.show({
                                                  title:"提示框",
                                                  msg:"删除图片成功",
                                                  buttons:Ext.MessageBox.OK , 
                                                  icon:Ext.MessageBox.INFO,
                                                  fn:function(){
                                                      store.reload();
                                                  }
                                              });
                                         }
                                         else
                                         {
                                              Ext.Msg.show({
                                                  title:"提示框",
                                                  msg:"删除图片失败, 请重试",
                                                  buttons:Ext.MessageBox.OK , 
                                                  icon:Ext.MessageBox.WARNING
                                              });   
                                         }
                                     }
                                 });
                                 
                                 Ext.MessageBox.hide();
                       }},
                       closable:true
                   });
               }
           });
       }
   });