Check Browser: "onload" event fires after a page is loaded completely, therefore, it is better to use from a blank page. You should avoid using this feature if your entry page of your web site. Run Link

Note when it opens with other browser

Safari, webbrowser that claims to the best of it's class, can't open windows html file

Now I opened this tutorial in safari browser, and note the page onload (from the blank loader) will open the page that should open in a browser other than internet explorer