function kj1_KeyPressFcn(hObject, eventdata, handles)
hm=uicontrol(gcf,'style','popupmenu',...
    'string','上下翻转|左右翻转|任意角度翻转',...
    'position',[250 20 50 20],'KeyPressFcn');
set(hm,'value',1)
v=get(hm,'string');
switch v,
        case 1
        axes(handles.axes2);
        x=(handles.img)
        if isrgb(handles.img)
            for k=1:3
                y(:,:,k)=flipud(x(:,:,k));
            end
            imshow(y)
        else
            x=(handles.img);
            y=flipud(x);
            imshow(y);
        end
        case 2
       axes(handles.axes2);
        if isrgb(handles.img)
             x=(handles.img);
            for k=1:3
                y(:,:,k)=fliplr(x(:,:,k));
            end
            imshow(y)
        else
            x=(handles.img);
            y=fliplr(x);
            imshow(y);
        end
         case 3
               axes(handles.axes2);
       prompt={'输入参数1：'};
       defans={'30'};
       p=inputdlg(prompt,'输入参数',1,defans);
       p1=str2num(p{1});
       y=imrotate(handles.img,p1);
       imshow(y);
end;
set(hm,'KeyPressFcn',handles.axes2)
set(gca,'position',[0.2 0.2 0.6 0.6])
title('弹出式菜单的使用')