code: function(className)
  	{
  		var el = this.__obj;
  		
  		if (el instanceof Element && className)
  		{
  			var classNames = className.trim().split(' ');
  
  			// IE11 doesn't support multiple parameters
  			while (className = classNames.pop())
  			{
  				el.classList.add(className);
  			}
  		}
  		
  		return this;
  	}
docs: Add the specified CSS class(es) to the element
  
  @param 		{string}	className - One or more CSS class names, separated by spaces
  @returns		{conbo.ElementProxy}