Whats the code for this

[i_will_learn_fl]

Ok in the infinite menu tutorial you have to rollover the left or right side to make the thing go left or right. How do you do it in such a way that there are 2 buttons on the left and right and when you press trhem it moves left or right and also what I want to do is that I want to have some small images in the boxes and when you click them they enlarge but I want a preloader for each image how do i do that?