You can accomplish this using the Firefox web browser and an extension designed specifically for this. The extension will let you download all of the images on a page or if the images are thumbnails it will download the larger images that the thumbnails link to.
I was able to find to extension very quickly so with minimal effort you should also be able to find it with in a minute or two.
I am not aware of an extension for Google Chrome that would do what you are wanting but there is probably one that does exists.