Automatic inclusion of external xhtml page in other pages
I need to include a Javascript script in each of several xhtml pages in each of my several domains to call a small free-standing xhtml page (consisting of some text and 3 images) located in one of my domains so that it is added seamlessly to the end of each of the pages as a footer. This is so that I can change the content of that single page at will and thereby update all pages without having to update 50 or 60 separate pages! How can I do that please? I have managed to include scripts for date/time and slideshow facilities, but I am still at the bottom of the learning curve.