Get CSS Selector for an element

getCSSSelector.js

function getCSSSelector(el) {
	var names = [];
	while (el.parentNode) {
		if (el.id) {
			names.unshift('#' + el.id);
			break;
		} else {
			if (el == el.ownerDocument.documentElement) {
				names.unshift(el.tagName);
			} else {
				for (var c=1, e=el; e.previousElementSibling; e=e.previousElementSibling, c++);
				names.unshift(el.tagName + ':nth-child(' + c + ')');
			}
			el = el.parentNode;
		}
	}
	return names.join(' > ');
}