Testing getComputedStyle
by MegaScience
HTML
<div id="test">
text
</div>
JavaScript
var test = document.getElementById('test'),
style = getComputedStyle(test, null);
for(var i = 0, len = style.length; i < len; i++)
document.body.innerHTML += style[i] + ": " + style.getPropertyValue(style[i]) + ";<br/>";