There is a very simple solution to display word documents , presentations, excel files etc on your own webpage itself. So people can read them directly without downloading the article and installing any plugin. You can take the help of google for this purpose.
- Either upload the documentation file on your server or arrange a link of any other server
- Place your link after the given link
Definitely, you would have to use “iframe” tag for this purpose. Read article Highly searched keywords in year 2010 for live demo.
Instead, if you are willing to display a website, document etc in a popup like thickbox then read the power of wordpress inbuilt thickbox. You can do it without installing any extra plugin.