新建EXT PANEL

    var j = new Ext.Window({
        id: 'uploadfile_win',
        modal: true,
        title: '上传文件',
        layout: 'fit',
        width: 480,
        height: 150,
        closeAction: 'close',
        plain: true,
        iconCls: "winicon",
        items: [i],
        buttons: [{
            text: '上传',
            handler: function(c, d, e) {
                var f = Ext.getCmp('filepic').startValue;
                if (f) {
                    i.getForm().submit({
                        success: function(a, b) {
                            if (b.result.code == '0') {
                                if (b.result.data != "") {
                                    g.MyEvents(0, b.result.data.replace(/\*sq\*/g, '\''))
                                }
                            } else {
                                Ext.Msg.alert('信息', b.result.code + '\r\n' + b.result.data)
                            }
                            j.close()
                        },
                        failure: function(a, b) {
                            Ext.Msg.alert('错误', b.result.msg)
                        }
                    })
                }
            }
        },
        {
            text: '取消',
            handler: function() {
                j.close()
            }
        }]
    });
    j.show()
}