For when you really want your shit on top.

fuckYouIWantMyShitOnTop.js

var fuckYouIWantMyShitOnTop = function (idOfElementYouWantOnTop) {
  var all = document.getElementsByTagName("*"),
      maxZIndex = 9007199254740992, // https://gist.github.com/jsatk/7921133#comment-968150
      i, highestZIndex, currentZIndex, currentEl;

  for (i = all.length - 1; i >= 0; i--) {
    currentEl = all[i];
    currentZIndex = Number(currentEl.style.zIndex);

    if (isNaN(currentZIndex)) continue;

    highestZIndex = isNaN(highestZIndex) || currentZIndex > highestZIndex ? currentZIndex : highestZIndex;
    currentEl.style.zIndex = currentZIndex === maxZIndex ? currentZIndex - 1 : currentZIndex;
  }

  document.getElementById(idOfElementYouWantOnTop).style.zIndex = highestZIndex + 1;
};

@joelmccracken @msepcot Done :)

@chriscoyier that's brilliant and terrifying. This entire thing is terrifying and was created as a joke. The only real use case I can see for this is if you're on a giant project and some element keeps getting covered up by other non-careful coders who abuse z-index you could invoke this script with the ID if the el you want on top somewhere ;)