cross-browser

Hi,

I'm new to php and web development. I looked for good frameworks and found yii very good. My concern is cross-browser compatibility. I mean I want to create a web app that is compatible among popular browsers. For example, like Google's GWT framework, when compiled, will generate scripts that is compatible among browsers. Is it possible with yii or is it outside the scope of yii.

I'm sorry I'm just new to web development. Thanks