Need help boxes attached to input fields using jQuery

Is开发者_如何转开发 there is any jQuery plugin or a script that attach a help div to an input field?

The help box only shows when the input field get focus.

Something like http://www.morbuilding.com/docs/index.php?idConteudo=806.

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You may to attach mouseenter/mouseleave and focus events to all input fields.

Test this: http://jsfiddle.net/q38wP/