JavaScript Sprite Animation Using jQuery » SitePoint: "2) Setting up some useful variables
We have a handful of numbers that we’ll need to use several times, so it makes sense to store them in variables. That means we’ll only need to update our script in two places if we decide to change our page size later. The variable names do a fairly good job of describing what they are:
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/* Page sizes*/
var $pageheight = 189; // our page height
var $pagewidth = 146; // our page width
var $pageYpos = 0; // current Y position of our bg-image "
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