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Ajax4jsf is an open source extension to the JavaServer Faces standard that adds AJAX capability to JSF applications without requiring the writing of any JavaScript. Ajax4jsf fully advantages the benefits of the JavaServer Faces framework including lifecycle, validation, and conversion facilities, along with management of static and dynamic resources. Using Ajax4jsf rich components with built-in AJAX support and a highly customizable look-and-feel can easily be incorporated into JSF applications.