Inserting html and scripts directly in Joomla articles (not using modules) or the plain html editor can be tricky. The reason: Joomla's standard editor TinyMCE and others automatically clean articles from tags such as applets and scripts when it saves an article.
This is perhaps one of the most frustrating aspects of Joomla. Especially if you want to use the interactive tools we present on this site, you need to have the ability to call scripts in an article.
We use Sourcerer to solve this issue. Developed by NoNumber, a high quality Joomla extension developer, the plugin allows you to insert scripts in pages without changing any of the Joomla settings. All you need to do is insert the code between two tags.
Please keep in mind that you insert the tags and the script directly using the WYSIWYG editor (see picture above) and not in the html view of the editor.
For more info, please visit the NoNumber website.