The guys at pooliestudios has created a CSS to enable you to identify the type of file involved, makes the difference between more than 50 types of links, whether pdf, xpi, skype, vcard, ppt, etc. … etc… … etc… …

All you have to do is upload folder icons to your server, and call your css:

HTML:
<link Rel = “stylesheet” type = “text/css” mean = “screen” href = “iconize.css” />

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