jQuerifty (NK mod)

gistfile1.js

javascript: (function() {
  var el = document.createElement('div'),
    b = document.getElementsByTagName('body')[0],
    otherlib = false,
    msg = '';
  el.id = 'jq-nk-mod';
  el.style.position = 'fixed';
  el.style.height = '30';
  el.style.width = '200';
  el.style.margin = '5px';
  el.style.top = '0';
  el.style.left = '0';
  el.style.padding = '5px';
  el.style.backgroundColor = '#F99';
  el.style.color = '#000';
  el.style.borderRadius = '5px';
  el.style.zIndex = 1001;
  el.innerHTML = msg;

  if(typeof jQuery != 'undefined') {
    msg = 'This page already using jQuery v' + jQuery.fn.jquery;
    return showMsg();
  } else if(typeof $ == 'function') {
    otherlib = true;
  }

  function getScript(url, success) {
    var script = document.createElement('script');
    script.src = url;
    var head = document.getElementsByTagName('head')[0],
      done = false;
    // Attach handlers for all browsers
    script.onload = script.onreadystatechange = function() {
      if(!done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete')) {
        done = true;
        success();
        script.onload = script.onreadystatechange = null;
        head.removeChild(script);
      }
    };
    head.appendChild(script);
  }
  getScript('http://code.jquery.com/jquery.min.js', function() {
    if(typeof jQuery == 'undefined') {
      msg = 'Sorry, but jQuery wasn\'t able to load';
    } else {
      msg = 'This page is now jQuerified with v' + jQuery.fn.jquery;
      if(otherlib) {
        msg += ' and noConflict(). Use $jq(), not $().';
      }
    }
    return showMsg();
  });

  function showMsg() {
    el.innerHTML = msg;
    b.appendChild(el);
    window.setTimeout(function() {
      if(typeof jQuery == 'undefined') {
        b.removeChild(el);
      } else {
        jQuery(el).fadeOut('slow', function() {
          jQuery(this).remove();
        });
        if(otherlib) {
          $jq = jQuery.noConflict();
        }
      }
    }, 2500);
  }
})();