function initPage() {
	var _nav = document.getElementById('wrapper');
	if (_nav) {
		var _nodes = _nav.getElementsByTagName('a');
		for (var i=0; i<_nodes.length; i++) {
			_nodes[i].onmousedown = function(){
				if (this.parentNode.className.indexOf('mousedown') == -1)
					this.parentNode.className += ' mousedown';
			};
			_nodes[i].onmouseup = function(){
				this.parentNode.className = this.parentNode.className.replace('mousedown','');
			}
		}
	}
}
if (window.addEventListener)
	window.addEventListener("load", initPage, false);
else if (window.attachEvent)
	window.attachEvent("onload", initPage);