JQuery validator tooltip, need help identifing javascript library?

Hi can anyone identify which javascript library was used to create this v开发者_开发百科alidation ui?

Thanks

EDIT:

I've discovered that this validation is caused by the standard JQuery library by adding required="true" to field names.

I've been debugging in jsfiddle and I've narrowed it down. See example.

http://jsfiddle.net/WypT8/31/

My main gripe was that I cant get it to work in IE.

Anyone any ideas?

Thanks

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Look ma, no JavaScript!

That is actually HTML5; the required attribute is used by the latest HTML5 compliant browsers to validate a form before being submitted.

jsFiddle.

It doesn't work in IE because IE does not support this feature yet.

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What about the library detector firefox add on?