Programming a demo of a web app in jquery

We are deploying some small web apps.

UI design is开发者_Go百科 quite hard if done right, so lacking resources, we are now looking for a simple way to bring the casual user up to speed (with our bad design ;)).

Are there jQuery plugins that could be used to create a demo? (fire events, move dialogs, etc. etc. ?)

Should we use a totally different approach?

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I prefer to do mockups using something like balsamiq - that way the customer doesn't think it's further along than it actually is.