You were probably given a javascript code to install on the page. I do not know Joomla but like Drupal it has a way for you to add to the header or footer the javascript that you need to add. You'll probably find more help asking Joomla support forum or list. Or maybe this piece of documentation helps? Adding JavaScript - Joomla! Documentation

it work just with joomla v1
try:
joomlaspan.com
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