In web pages, it is possible to create pseudo-animations by writing JavaScript code that loads still PNG or JPEG images of each frame and displays them one by one for a specified time interval. Apart from requiring the user to have JavaScript support and choose not to disable it, this method can be CPU- and bandwidth-intensive for pages with more than one image, large images, or high framerates, and does not allow the animation to be saved in one image file or posted on image-based sites such as flickr or imageboards.