Jquery - Animate a graph

Jquery - Animate a graph

Hi I am new to jQuery and am loving the write less do more approach.

I was looking to create a simple bar chart based on form results (without plug ins) each bar will be an empty div with  css values proving the dimensions. I wanted to animate the height of these bars using the css height property using values from a form. The instead of animating up, the bars animate down from the top. 

I appreciate this may be more of a CSS question but would appreciate any views?