When defining the horizontal and vertical size of an image of a rollover operation of the first image, if the size of the second image differs from the first, the second image will stretch or shrink to the defined size of the first image of the rollover operation.
The above image is using an inline rollover operation, an inline rollover operation is good to use when rollovering few images.
The above image is using a scripting function rollover operation, a scripting function rollover operation is usually useful when rollovering a large amount of images, which gives you the option of putting all the images into an array.
