Yii Custom Widget

Question

I am trying to create a Yii widget that will generate google charts (http://code.google.com/apis/chart).

How to create a widget that writes code in html headers (where javascript will be included, etc.) and in the html tag?

Answer 1

I found my answer:

Yii::app()->clientScript->registerScriptFile() 

and

 Yii::app()->clientScript->registerScript()