Inluding multiple javascript files via javascript

The problem is typical: How can I include a javascript library or multiple .js files with only 1 javascript include.

Basically, here's a quick sample using jquery, though obviously it can be done without it.

js1.js {
      $('head').ready(function() {
   $('head').append('<script language="JavaScript" 
              type="text/javascript" src="http://javascriptFile2.js"></script>');
      });
      $('head').ready(function() {
   $('head').append('<script language="JavaScript" 
              type="text/javascript" src="javascriptFile3"></script>');
      });
}

That's all there is to it. Now javascriptFile3 can access the methods of javasriptFile2.