Software: Basic SVG Shapes and Javascript

Once I realised that I can reference SVG objects in Javascript by using object = document.getElementById(), it became a straightforward task to change any attribute of an SVG object using object.setAttribute(). I added a control panel to my Basic SVG page, which I started last weekend, to interactively set the attributes of the SVG objects on that page. Now, I can immediately see the effects of setting different values to fill, fill-opacity, fill-rule, stroke, stroke-linecap, stroke-dasharray, stroke-linejoin, stroke-opacity, stroke-width.