If you have been working with the default validators in ASP.NET for a while you are probably used to the plain old look they create on your page and while you can rework the way they look, ASP.NET validators are essentially a Label. They are unable to change the appearance of other elements or run scripts without a complete page postback. jQuery TOOLS is a jQuery based UI library you can find here. jQuery TOOLS contains a validator as a part of its form tools. The jQuery TOOLS validator is based on HTML 5 and CSS standards and has the ability to animate, change the appearances of the element it is validating, support multiple languages and more.