getElementStyle.js

function getElementScale(elem) {
	var transform = /matrix\([^\)]+\)/.exec(window.getComputedStyle(elem)['-webkit-transform']),
		scale = {'x': 1, 'y': 1};
	if( transform ) {
		transform = transform[0].replace('matrix(', '').replace(')', '').split(', ');
		scale.x = parseFloat(transform[0]);
		scale.y = parseFloat(transform[3]);
	}
	return scale;
}