What modification/style is this?

[vexxy]

I've seen that many have this js thing onto their forums, in different forms and shapes, I'm wondering what mod is this? The style I took the screenshot from is here on vbulletin.org, but upon installing it doesn't come with that...any ideeas?

[MOGmartin]

I've seen that many have this js thing onto their forums, in different forms and shapes, I'm wondering what mod is this? The style I took the screenshot from is here on vbulletin.org, but upon installing it doesn't come with that...any ideeas?

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