function initPage(){addClass({tagName:'a', tagClass:'show', classAdd:'active', addToParent:true})}
function addClass (_options) {
	var _tagName = _options.tagName;
	var _tagClass = _options.tagClass;
	var _classAdd = _options.classAdd;
	var _addToParent = false || _options.addToParent;
	var _el = document.getElementsByTagName(_tagName);
	if (_el) {
		for (var i=0; i < _el.length; i++) {
			if (_el[i].className.indexOf(_tagClass) != -1) {
				_el[i].onclick = function() {
					if (_addToParent) {
						_p = this.parentNode;

						if (_p.parentNode.className.indexOf(_classAdd) == -1) { _p.parentNode.className += ' '+_classAdd;}
						else {_p.parentNode.className = _p.parentNode.className.replace(_classAdd,'');}
					}
					else {
						if (this.className.indexOf(_classAdd) == -1) {this.className += ' '+_classAdd;}
						else {this.className = this.className.replace(_classAdd,'');}
					}
					return false;
				}
			}
		}
	}
}
if (window.addEventListener) window.addEventListener("load", initPage, false);
else if (window.attachEvent) window.attachEvent("onload", initPage);