You plan to display the current date and time on all your web pages. Suppose you wrote the code and copied it in to all your web pages (say 100). But later, you want to change the format in which the date or time is displayed. In this case, you will have to make changes to all the 100 web pages. This will be a very time-consuming and difficult task.
So, save the JavaScript code in a new file with the extension .js. Then, add a line of code in all your web pages to point to your .js file like this:
<script type="text/javascript," src="/currentdetails.js,">
anand.johari1994