Following "How to Build Websites" at course 7 Javascript Programming: Part 6

[Andie]

Please see attached screenshots. Following the instructions I had to delete the below script and just write in the windows.alert("This is an alert box!"); on the blank page to get that to show up in the opened html page. But is that what I am looking for? Doesn't make sense to me of why insert the below script then delete it. So, of course I am lost on the purpose of this exercise. Was something else supposed to happen? I don't understand the lesson.

[Andie]

When I leave the script and write the window.alert("This is an alert box!"); after the above script I get the same in a browser window. Issue is what does the <script type="text/javascript" language="javaScript">// <![CDATA[
function callAlert() {              window.alert("This is an alert box!");              }
// ]]></script> even mean?