var get = {
	id : function(id) {
		return document.getElementById(id);
	},
	tag : function(t, p) {
		return p ? p.getElementsByTagName(t) : document.getElementsByTagName(t);
	}
};
function dropdown(o, dd, cs, e) {
	var enableSwap = e || true;
	var swapClass = 'active';
	var dd = get.id(dd);
	var cs = cs ? get.id(cs) : o;
	var oc = cs.className;
	if(dd.hasChildNodes()) {
		dd.style.display = 'block';
		if(enableSwap) cs.className = swapClass;
		o.onmouseout = function() {
			dd.style.display = 'none';
			if(enableSwap) cs.className = oc;
		}
	}
};