ASP.NET AJAX入门系列（1）：概述

This extender adds "watermark" prompt text to TextBoxes on the page.

ToggleButton

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This extender turns an ASP.NET CheckBox into an image checkbox. 字串5

UpdatePanelAnimation

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Animates page elements corresponding to hidden postback activity. 字串9

ValidatorCallout

This extender enhances the functionality of existing ASP.NET validators.

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