I want to put several banners at left and right sidebar. Every banner contains 4 images which change every second. If the visitor click the banner, it will open certain post which I choose. For this purpose, what plugin can I use in my wordpress site ? Thanks.
Yes sure.. you can use wordpress. Just find the suitable theme then add a plugin to show that kind of banner, the plugin usually namely with 'slideshow banner' or 'roll advertisement' , You can find tons of wordpress plugin at your wp-admin area to work on this..