Sorry! I made a mistake in the ppt and while explaining the types. Types of GlideAjax: 1. Synchronous GlideAjax GlideAjax - getXMLWait() 2. Asynchronous GlideAjax GlideAjax - getXML(Function callback) GlideAjax - getXMLAnswer(Function callback, Object additionalParam, Object responseParam) It is always suggested to use the Asynchronous GlideAjax than the Synchronous.