Dom Node is Unique

Here is an interesting fact about DOM nodes. When you are moving a node from one parent to another parent, you don't have to remove it from first parent. Yes! you read it right. You don't have to remove it from first parent secondParent.appendChild(domNode) will do the needful. Since DOM nodes are unique, they can be there only at one place at a time.

ProToVis: SVG Based Data Visualization Library

Just went through one of most advanced data visualization library using JavaScript. Library looks promising and very well documented. Even though there is no clear list of browsers supported you should assume this work only in modern browsers, and will make a strong case of in-house products.

This site promotes learn by example, and examples cover almost all possible data visualization needs. For most generic needs just copy-paste example should do.

http://vis.stanford.edu/protovis/