Have a look at the example below. It will do nothing! Actually, this is just the skeleton that you have to use every time you will write your script, except the comments that are optional.
A Simple Script
<html> <head> <title>My First Script</title> </head> <body> <h1>My First Script</h1>
document.write("What a <b>wonderfull</b> day! Today is "); document.write(today) //--> </script>
You should use this tag when appropriate ó it helps keep your content accessible.