gistfile1.js

  repositionPage: function() {
    var page = $$('.page.active').first();
    var scrollOffset = document.viewport.getScrollOffsets();
    var dimensions = document.viewport.getDimensions();
    var header = page.down(".header");
    var footer = page.down(".footer");

    header.setStyle({top: scrollOffset.top + "px"});
    footer.setStyle({
      top: (scrollOffset.top + dimensions.height - footer.getHeight()) + "px"
    });
  },