Declaring JavaScript
Adding JavaScript to a web page is actually surprisingly easy! To add a JavaScript all you need to add is the following (either between the <head></head> tags or between the <body></body> tags - I will explain more about this later):
<script language="JavaScript">
JavaScript
</script>
As you can see the JavaScript is just contained in a normal HTML tag set. The next thing you must do is make sure that the older browsers ignore it. If you don't do this the code for the JavaScript will be shown which will look awful.
There are two things you must do to hide the code from older browsers and show something instead:
<script language="JavaScript">
<!--Begin Hide
JavaScript
// End Hide-->
</script>
<noscript>
HTML Code
</noscript>
As you can see this makes the code look a lot more complex, but it is really quite simple. If you look closely you can see that all that has been done is that the JavaScript is now contained in an HTML comment tag. This is so that any old browsers which do not understand <script> will just think it is an HTML comment and ignore it.
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