Password strength meter

I'm using Rails 3. Could anyone suggest me a plugin (jQuery, Prototype) that works well? It will 开发者_如何学Gobe fantastic if there is a plugin for formtastic.

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Here is a whole slew of them.

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http://runnable.com/UfJrnXtk2tZXAAA1/how-to-check-password-strength-using-jquery

This one work like a charm!!!

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This is a nice one. Im using it in a grails project, no complains.

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I created a JQuery Strength Meter plugin if interested. It converts a password input to a dynamic strength meter as you type and displays toggleMask to hide/show password. Supports plugin events and methods to control.You can override the templates if you do not want Bootstrap 3.x markup. Here is the source.