Stop. Hammer time.

hammerTime.js

;(function(window, document, undefined) {
  'use strict';
  
  var img = document.createElement('img');
  var marquee = document.createElement('marquee');
  
  img.src = 'http://dhtmlconf.com/img/mchammer.gif';
  
  marquee.appendChild(img);
  marquee.style.position = 'absolute';
  marquee.style.top = '0';
  marquee.style.left = '0';
  marquee.style.width = window.width;
  marquee.style.zIndex = '9999999999999999';
  
  document.body.appendChild(marquee);
})(window, document);

hammerTime.min.js

!function(e,t,i){"use strict";var l=t.createElement("img"),d=t.createElement("marquee");l.src="http://dhtmlconf.com/img/mchammer.gif",d.appendChild(l),d.style.position="absolute",d.style.top="0",d.style.left="0",d.style.width=e.width,d.style.zIndex="9999999999999999",t.body.appendChild(d)}(window,document);