SVG 1.1 dynamic update tests

Tests dynamic updates of the 'cx' attribute of the SVGEllipseElement object

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS ellipseElement.getAttribute('cx') is "-50"
PASS ellipseElement.getAttribute('cx') is "150"
PASS successfullyParsed is true

TEST COMPLETE