- elem.className = classNames != undefined ?
- jQuery.grep(elem.className.split(/\s+/), function(className){
- return !jQuery.className.has( classNames, className );
- }).join(" ") :
- "";
+ if (elem.nodeType == 1)
+ elem.className = classNames != undefined ?
+ jQuery.grep(elem.className.split(/\s+/), function(className){
+ return !jQuery.className.has( classNames, className );
+ }).join(" ") :
+ "";