233359 Graph engine needed

We are in need of a script that is able to accept inputs and draw graphs. Can be line, bar, or even pie chart. We prefer the script to be in php (ajax preferred) but we are also acceptable to Flash or Java. The graph engine must allow us to change and label the axis we require. Please provide relevant demo when you bid. Whoever can produce the best graph engine at the most reasonable price will win the bid. Thanks.