all the string getting deleted from the page. Congratulation, you created your first Ajax program! Enhancing Your Ajax application The following exercise is builds on the previous example and replaces the helloAjax.txt file with a Http Servlet. Because a servlet is more dynamic than a file in that it can contain logic to modify the format of the response based on pre-defined definitions, you use a CSS style sheet to color the returned rows alternating and also display a text typed in by the page user. 1. Open the JDeveloper New Gallery using the New option on the Ajaxprj project. Choose the CSS File choice of the Web Tier &gt; HTML tree entry. Give the file a name of helloAjax.css , and again make sure it gets added under the public_html directory. The div.message b.red tag writes all &lt;b&gt; elements with a gray background color and a red font color that have a class attribute of "red" and that are embedded as a child element in a HTML &lt;DIV&gt; element with a class attribute of message. The &lt;DIV&gt; and &lt;b&gt; HTML elements are created dynamically as part of the server response returned to the asynchronous Ajax request. 4. To create the Http Servlet, select New from the JDeveloper context menu and select the Web Tier &gt; Servlets entry. From the available items, choose HTTP Servlet . Name the servlet class HelloAjax and keep the default values for all other fields and dialogs. This will create a Http Servlet that is