PHP & JavaScript

[D@Z]

I'm currently making a design which invloves PHP in HTML. Here is a quick example:

<?php
print("<table width=\"100%\" align=\"center\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\">"); 
print("<tr><td class=\"header\">"); 
print("<a href=\"/\">"); 
print("<img src=\"img/header.gif\" width=\"390\" height=\"80\" alt=\"\" border=\"0\" /></a></td>"); 
print("</tr></table>"); 
?>

The design is uploaded at: http://daz.shockonline.net/
What I'm basically stuck with is, I'm trying to add a google add to my header but when I add the script, it just doesn't work. YES, I have followed the above coding for the "". Can anyone help?

Thanks