Calling a function when using form objects (e.g.listbox)

[cineplex]

I know that with Javascript, a function can be called with the onChange() method. Therefore, if I were to select a value from a list box, the onChange() could be used to call a function.

How does this work with PHP? Is there a similar function or method?

When I select an item from a list box, I want to call a function to do something with the item selected.

Thanks.

[drew010]

JavaScript is a client side scripting language, therefore when the client does something on a javascript code snippet, something can happen instantly. PHP is a server side scripting language, meaning the data has to be sent to the server before anything can happen. so if a user selects something from a select box, the data must be passed to the php script by means of a submit button in order for a function to be executed.