Sure, here is an example (standard HTML boilerplate omitted):
<svg id="svg1" xmlns="http://www.w3.org/2000/svg" style="width: 3.5in; height: 1in">_x000D_
<circle id="circle1" r="30" cx="34" cy="34" _x000D_
style="fill: red; stroke: blue; stroke-width: 2"/>_x000D_
</svg>_x000D_
<button onclick="circle1.style.fill='yellow';">Click to change to yellow</button>
_x000D_
~ Answered on 2012-03-26 13:44:39