Grabs the maximum resolution for the images in the set
当前为
script only works on the images in an actual post (ex:https://knaiifu.tumblr.com/post/189790583347/roses), a limitation of tumblr's recent backend changes, but in exchange we get upgraded from 1280 to 2048 resolution
the image urls of new images uploaded now are stored html of the post at
note: this script triggers pop-up blockers when opening multiple images at once so it works better if you allow tumblr to show pop-ups
