UI command controls extend the CAF.Link.Model with the CAF.Command.Model. A CAF.Command.Model's value is the control's ID. The raise() method is also available on the CAF.Command.Model. The raise() method makes the link active and simulates a click on the link by a user. The CAF.Command.Model has a go(params) method that enables you to invoke the command directly, without simulating a user click action on the command button or link with the specified request parameters. For example, create a HiddenCommand with an server-side ID of myCommandId, and set a simple output Button, and set its onclick property to the following:

The CAF.Command.Model enables registering the client-side action-listeners, which are invoked when the command in initiated after the form has been validated but before it is submitted. A client-side action-listener is a method that accepts one argument, the client-side ID of the command control. If the action-listener returns false, the command aborts and the form is not submitted. For example, the following JavaScript code adds an action-listener to the command with a server-side ID of myCommandId, and aborts the processing of the command until the command has been invoked five times:

For more information about CAF controls, see the webMethods CAF Tag Library Reference, as described in Finding Information about CAF Controls.