var addPrintLink = {
  init: function (sTargetEl, sLinkText) {
    if (!document.getElementById || !document.createTextNode) {
      return;
    } // Check for DOM support
    if (!document.getElementById(sTargetEl)) {
      return;
    } // Check that the target element actually exists
    if (!window.print) {
      return;
    } // Check that the browser supports window.print
    var oTarget = document.getElementById(sTargetEl);
    var oLink = document.createElement('a');
    oLink.id = 'print-link'; // Give the link an id to allow styling
    oLink.href = '#'; // Make the link focusable for keyboard users
    oLink.appendChild(document.createTextNode(sLinkText));
    oLink.onclick = function () {
      window.print();
      return false;
    } // Return false prevents the browser from following the link and jumping to the top of the page after printing
    oTarget.appendChild(oLink);
  },
  /* addEvent function included here for portability. Replace with your own addEvent function if you use one. */
  /* addEvent function from http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html */
  addEvent: function (obj, type, fn) {
    if (obj.addEventListener) obj.addEventListener(type, fn, false);
    else if (obj.attachEvent) {
      obj["e" + type + fn] = fn;
      obj[type + fn] = function () {
        obj["e" + type + fn](window.event);
      }
      obj.attachEvent("on" + type, obj[type + fn]);
    }
  }
};
addPrintLink.addEvent(window, 'load', function () {
  addPrintLink.init('article', 'Print this page');
});