Duplicates <link> and <style> elements in a new document (useful for spawning sub-windows)

copyStyle.js

function copyStyle(oldDoc, newDoc) {
	var links = oldDoc.getElementsByTagName('link');
	for (var i = 0; i < links.length; i++) {
		var oldElement = links[i];
		var newElement = newDoc.createElement('link');
		newElement.rel = oldElement.rel;
		newElement.href = oldElement.href;
		newDoc.head.appendChild(newElement);
	}
	var styles = oldDoc.getElementsByTagName('style');
	for (var i = 0; i < styles.length; i++) {
		var oldElement = styles[i];
		var newElement = newDoc.createElement('style');
		newElement.innerHTML = oldElement.innerHTML;
		newDoc.head.appendChild(newElement);
	}
}