The script looks through the page for any images with the class "low", and if found, reveals a button on the page and attaches the image swapping function to it. The function swaps out the source, and doubles the width/height.

The half size low-res image does two things: it greatly reduces the file size, and shows the pixels better (when enlarged by CSS). By using "image-rendering: crisp-edges;" in the CSS, the enlarged pixels are kept sharp.

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