clsJSPHP: Update page sections without reloading the page

This class can be used to update page sections without reloading the whole page by performing AJAX requests.

The class generates the necessary Javascript code to perform AJAX requests in a way that works with the browsers Internet Explorer, Mozilla and Safari.

The class provides several functions that can generate the necessary Javascript that can implement several types of actions when it is executed on the browser side.

Currently it supports actions for updating the HTML of page section, change the presentation style of a given page element, add options to a given form select input, open an alert message window or execute arbitrary Javascript.