Declaring a Function in the 'head' Block

   
<html>
<head>
  <title>JavaScript Unleashed</title>
  <script type="text/javascript">
  <!--
    function defaultColors() {
      document.writeln("Inside of defaultColors()");
      document.fgColor = "black";
      document.bgColor = "white";    
    }
  // -->
  </script>
</head>
<body>
  <script type="text/javascript">
  <!--     
    document.writeln("Functions are scripts just waiting to run!");
    defaultColors();
    document.writeln("All done.");
  // -->
  </script>
</body>
</html>

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Declaring a Function in the 'head' Block : Function « Language Basics « JavaScript DHTML

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