Kohana v .3.0.8 Framework - Dynamically filling the dropdown list based on first dropdown

I am using Kohana v 3.0.8 Framework, not very much familiar with Kohana and only a novice with PHP and Javascript.

开发者_开发问答I am working on a project where I have a Form::select (dropdown list) filled with a list of categories and another select (dropdown list) which needs to be filled dynamically based on which of my categories in the first select (Dropdown list) is selected. So I know I need an "onchange" function, but I am not sure how to include it.

Please can anyone provide me an example on it. How to do it using ajax and kohana?

Your help will be appreciated.

Thank you.

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There is an attributes parameter

<?php echo Form::select('name', array(),'', array('onchange', 'myFunction()')); ?>