2301   hasClassName: function(element, className) {  argument
2303     var elementClassName = element.className;
2304     return (elementClassName.length > 0 && (elementClassName == className ||
2305       new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
2308   addClassName: function(element, className) {  argument
2310     if (!Element.hasClassName(element, className))
2311       element.className += (element.className ? ' ' : '') + className;
2315   removeClassName: function(element, className) {  argument
2317     element.className = element.className.replace(
2318       new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
2322   toggleClassName: function(element, className) {  argument
2324     return Element[Element.hasClassName(element, className) ?
2325       'removeClassName' : 'addClassName'](element, className);
2493       className: 'class',  property in Element._attributeTranslations.write.names
2588     if (el.className !== 'x') {
2590       if (el.className === 'x') {
4579 			return (" " + (elem.className || elem.getAttribute("class")) + " ")
4816 	div.lastChild.className = "e";
5965   function(element, className) {
5966     className = className.toString().strip();
5967     var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
5969   } : function(element, className) {
5970     className = className.toString().strip();
5971     var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
5972     if (!classNames && !className) return elements;
5975     className = ' ' + className + ' ';
5978       if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
5987   return function(className, parentElement) {  argument
5988     return $(parentElement || document.body).getElementsByClassName(className);
6001     this.element.className.split(/\s+/).select(function(name) {
6006   set: function(className) {
6007     this.element.className = className;