Fixes page scroll "jumping" on mobile devices with auto-hiding address bar, when it contains a 100% height element.

responsive.js

/* responsive.js (v. 1.0.0)
 * by Matheus Pratta (matheus.io)
 * Fixes the page scroll from "jumping" when the user scrolls from a mobile device which auto-hides the address bar.
 * Note: for 100% height elements, instead of seeing a jump in the scroll, the user may see a jump on the element itself (mostly when it's vertically centered)
 * Requires: jQuery
 */
$(document).ready(function() {
  $(window)
    .scroll(function() {
      window._scroll_pos = $(window).scrollTop();
      window._scroll_height = $(window).height();
    })
    .resize(function() {
      var oH = parseInt(window._scroll_height);
      var nH = parseInt($(window).height());

      if(oH != nH) {
        var offset = nH - oH;
        $(window).scrollTop(window._scroll_pos + offset);
      }
    })
})