How to read individual '-webkit-transform' values in JavaScript?

Programmer Question

Webkit's blog post from last year on 3D transforms explains the various transform 'functions' that can be used in the -webkit-transform property. For example:

#myDiv {
  -webkit-transform: scale(1.1) rotateY(7deg) translateZ(-1px);
}

My question: how do you access individual values in JavaScript? When you read the webkitTransform property of the element, you just get a matrix3d() function with 16 values in it, like this...

matrix3d(0.958684, 0.000000, .....)

Is there a way to just read the value of an individual transform thing, like rotateY()? Or do I have to read it from the matrix3d() string, and how?

Find the answer here