Asynchronous JavaScript and XML (AJAX)

Asynchronous JavaScript and XML (AJAX) is a Web technology that allows browser-based applications to communicate with a server without transmitting the entire HTTP input, and to render only parts of the form rather than the entire form.

Using XML and the Document Object Model, AJAX-based software can provide more interactivity to browser-based applications and reduce the traffic between the client (browser) and the server.

PRPC uses AJAX technology in:

• Dynamic select operations
• Deferred loading of sections of user forms
• Display on user forms and flow action forms of calculated values computed by declare expression rules
• Pop-up windows associated with report displays (known as the SmartInfo feature)
• SmartPrompt support
• Autocomplete JSP processing
• User interface events such as Visible When, Refresh When
• Several form-based rule forms

If your application uses a JavaScript-event and URL to start execution of an activity using AJAX, select the May Start? check box on the Security tab of the Activity form.

This capability is supported by Microsoft's implementation of the XMLHTTP application programmer interface. For Internet Explorer 7++, XMLHTTP is implemented directly rather than as an ActiveX control.

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