/* Some css utility scripts */

function addClass(obj,cName) {
	if (!hasClass(obj,cName)) {
  	obj.className+=obj.className?' '+cName:cName;
  }
  return true;
}

function hasClass(obj,cName) {
	return new RegExp('\\b'+cName+'\\b').test(obj.className);
}

function removeClass(obj,cName) {
	if (!hasClass(obj,cName)) return false;
  var rep=obj.className.match(' '+cName)?' '+cName:cName; obj.className=obj.className.replace(rep,'');
  return true;
}