Get All Element Styles inside javascript

I would like to know if I can get all styles of an element ( from
style node , external css and inline css) inside javascript.

Iam able to get individual styles from
document.defaultView.getComputedStyle(x,null).getPropertyValue
(styleProp); as shown


Is it possible to list all style properties configured and then get
the values?.

Thanks in Advance,
Krithi


function getStyle(el,styleProp)
{
	var x = document.getElementById(el);
	if (x.currentStyle)
		var y = x.currentStyle[styleProp];
	else if (window.getComputedStyle)
		var y = document.defaultView.getComputedStyle
(x,null).getPropertyValue(styleProp);
	return y;
}