SVG re-ordering z-index (Raphael optional)

Question

How can I reorder Raphael or their underlying SVG elements after creation. Better yet, do something like layers exist in SVG?

Ideally I would like two or more layers

Answer 1

Actually, I think appendChild() alone will copy the element and not just move it. This may not be a problem but if you want to avoid duplicates I suggest something like this:

el.parentNode.appendChild(el.parentNode.removeChild(el));