how use ckeditor on two part ?

hi all.

I'm programming language php.

my project is two part.

part one is "test.php" :

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
<script type="text/javascript" src="ckeditor/ckeditor.js"></script>

</head>

<body>
  <?php include_once("fckeditor.php"); ?>
</body>
</html>

part two is "fckeditor" :

<textarea name="test-textarea"></textarea>
  <script type="text/javascript">
     CKEDITOR.replace( 'test-textarea',{
       width: "500px",
       height: "250px"
	})
  </script>

but i don't know , what show incorrect.

my english writing is weak sorry.

please help me . thanks