// className functions
// Dean Edwards 2004.03.29
 function addClass(element, className){ if (!hasClass(element, className)){ var classString = element.className + " " + className; element.className = classString.replace(/^\s*|\s*$/g,''); }}  function removeClass(element, className){ var classString = element.className.replace(new RegExp("\\b\\s*" + className + "\\b", "g"), ""); element.className = classString.replace(/^\s*|\s*$/g,''); }  function hasClass(element, className){ return (new RegExp("\\b" + className + "\\b")).test(element.className); }