IE6 places a friendly popup request for IE6 users to upgrade their browsers. By placing a simple conditional comment linking to some JavaScript in your page.tpl.php, visitors using the outdated and buggy IE6 web browser will see a small roll-down on the top of their browsers, “nagging” them to upgrade. After clicking the roll-down, a new browser window opens with links to other recommended browsers: IE6 is a horrible blemish on the web and is the cause of millions of hours of wasted developer time: the sooner we get rid of it, the better.