New Post: Specify function Width as percentage

I'm still getting familiar with C1, exploring the beta and the latest released version.

When inserting a function or a table, I'd like to be able to specify the width as a percentage. For example, being able to insert a YouTube video or facebook like box that takes 80% of the container's width, or a table with columns that are sized based on the total width of the page. This is so the site can adapt to different resolutions.

When inserting a Composite.Media.YouTube function, is there a function that returns the width in pixels of the container based on a desired percentage? Or do I have to do it through css and/or javascript?

Thanks