brettz9

/**
 * Add dataset support to elements
 * No globals, no overriding prototype with non-standard methods, 
 *   handles CamelCase properly, attempts to use standard 
 *   Object.defineProperty() (and Function bind()) methods, 
 *   falls back to native implementation when existing
 * Inspired by http://code.eligrey.com/html5/dataset/ 
 *   (via https://github.com/adalgiso/html5-dataset/blob/master/html5-dataset.js )
 * Depends on Function.bind and Object.defineProperty/Object.getOwnPropertyDescriptor (polyfills below)
 * All code below is Licensed under the X11/MIT License

joshbeckman

document.getElementsByTagName('button')[0].onclick = function () {
   scrollTo(document.body, 0, 1250);   
}
    
function scrollTo(element, to, duration) {
    var start = element.scrollTop,
        change = to - start,
        currentTime = 0,
        increment = 20;