AJAX EVENTS

Using AJAX reduces the amount of unnecessary data traffic with the server thereby speeding up application processing. It allows individual data components on a page to be updated without the need to refresh the entire page.

Figure 1: AJAX event interface.

The following events are available in ScriptCase.

• onChange - This event fires when the field has focus and the field value is changed and the focus is then directed to another object.
• onClick - This events fires when the field is clicked.
• onBlur - This events fires when the field has focus, the field value is NOT changed and the focus is directed to another object.
• onFocus - This events fires when the field has focus.

Only the onClick event is available to Grid applications.

See the example below: The user field is validated against a database (table). For valid users it returns the name. For invalid users a message is displayed.

Example:

1 - Select the field and the event used by the AJAX process, (in PHP code). Passing parameters is optional.

Figure 2: Selecting fields and events for AJAX processing.

2 -Enter the PHP business rule in the PHP editor. The code is processed by the Server and the XML result is sent to the browser.

Figure 3: Programming PHP with AJAX.

1. PHP editor - Use it to type in your PHP code.

2. Insert Code - ScriptCase provides you with a number of predefined blocks of code that can be inserted into the PHP editor and then amended accordingly.

3. Parameters (Fields) - Use this to create parameters retrieving field values.

Any event can use pre-defined functions (macros) that are available in Scriptcase. These functions are called "Scriptcase Macros".

• Read more about Scriptcase Macros.