function DOMUtils() {
	throw 'DOMUtils can not be instantiated.';
}

DOMUtils.getId = function(id, node) {
	if(!node){
		node = document;
	}
	return document.getElementById(id);
};

DOMUtils.getTags = function(tagName, node){
	if(!node){
		node = document;
	}
	return document.getElementsByTagName(id);
}