In various embodiments, a method, a system, and a computer-readable medium are disclosed for creating a pool of images available for display, such as in one or more web pages. In one embodiment, a method is disclosed that includes generating a pre-determined number N of numbers and encoding an instruction in a markup language document. The instruction includes the N numbers and is executed by one or more processors to select N images for insertion into the markup language document. The N images are selected from all available images using the N numbers, and the N images are placed in the markup language document at one or more respective locations defined in the instruction with the N images to be displayed on one or more web pages. Other embodiments are also disclosed.