Reset the TWebBrowser Delphi control to an Empty (Blank) Page

Let's say you have a TWebBrowser component, named "webBrowser1", on a form. To navigate to the About Delphi Programming site main page you can use the next code line:

 webBrowser1.Navigate('http://delphi.com') ; 

If, for whatever the reason is, you have to clear the web browser window, "reset" it, and display an empty page, you need to navigate to a "blank" page.

Here's 

how do "reset" the TWebBrowser to display a blank, empty page:

 webBrowser1.Navigate('about:blank') ;