function NodeList() {
	var nodes = new Array();
	nodes.item = function(index) { return nodes[index]; }
	return nodes;
}

function GetElementsByClassName() {
	this.getElementsByClassName = function() {
		var i, j, nodes, element, matches;
		var list = new NodeList();

		// Get all the nodes
		if (this.getElementsByTagNameNS) {
			nodes = this.getElementsByTagNameNS("*", "*");
		} else if (this.getElementsByTagName) {
			nodes = this.getElementsByTagName("*");
		} else {
			return null;
		}

		// Iterate through the nodes
		for (i = 0; i < nodes.length; i++) {
			element = nodes.item(i);

			// Ensure that the hasClassName method has been attached to the element
			try {
				matches = true;
				// Iterate through the class name arguments to check the element has all of them
				for (j = 0; j < arguments.length && matches; j++) {
					// See Element.prototype.hasClassName defined in ElementClassName.js.
					if (!element.hasClassName(arguments[j])) matches = false;
				}
				if (matches) list.push(element);
			} catch(e) {
				// Error, hasClassName() failed
				matches = false;
			}
		}
		return list;
	}
}
GetElementsByClassName.apply(Document.prototype);
GetElementsByClassName.apply(Element.prototype);