This scroller/viewer is similar to one using MooTools. It scrolls both the semi-transparent content divs to designated targets AND the optional background image, using smooth scrolling. The javascript source for this is lightweight, about 125 lines of code (5.73 kb) compared with about 10,000 lines in the MooTools-core and MooTools-more libraries (237 kb).

Feel free to use it. Please retain the copyleft GPL license notice intact.

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