function mouseoverRB(node) {
	if (node.hasChildNodes) {
		children = node.getElementsByTagName("img");
		for (var child in children) {
			alert(child.src);
			if(typeof child == "img") {
				// change image
				alert('This is an image!')
			} else if (child.hasChildNodes) {
				mouseoverRB(child);
			}
		}
		
	} 
}