These buttons were created using the FORM tag.
The initial color of the button as well as text is defined in the cascading style sheet, which is a seperate file linked in the heading of this page (JavaScript.html)
That page also includes the IFRAME tag. This text you are now reading is actually the page js0001.html (in a frame) on the page JavaScript.html Notice the lighter blue pinstripe border around this text? That is the edge of the frame.
When you click on a button it serves up the linked page in this frame, replacing whatever is there (such as what you are reading now.)
An example of this code for each part may be seen by clicking on the next few buttons down.
In the head of main page (JavaScript.html) you will need to link to your style sheet. Assuming the style sheet is called ImaStyleSheet.css, your tag will need to be the following:

<link rel="stylesheet" href="ImaStyleSheet.css" type="text/css">



It should appear between your head tags thus:

<head>

<link rel="stylesheet" href="ImaStyleSheet.css" type="text/css">

</head>