How to create a Flow chart? Javascript or Flash?

I want to create a simple grap开发者_开发技巧h as this screeshot :

: alt text http://s6.imagestime.com/out.php/i417041_grapha.jpg the nodes must be clickablea nd they must have various forms. the arcs must have various colours and arrows! I found this javascript library :Raphael but I can't write into the nodes.

Can anybody help me to find a library, javascript or flash, that create a sample graph as the screenshot? Thanks

You can use RaVis in Flash. Watch a demo here