large external script to include in many pages

Hello, I am testing a new DHTML code for navigation menus. I plan to use it throughout my web pages made with PHP. The script is about 600 lines long! Beside making a : define (script1, "" . "" . "" . ""); and calling the script1 name in my PHP pages... this will be very, very long, is there a another way to create a kind of variable ($myscript == 600 lines of the DHTML) that I could simply call out in all my pages. Something like a <script src="../myscript.js"> The define approach doesn't seem to be very appropriate for a very long text inclusion... Thanks! -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Marc Andre Paquin