be able to remove class by RegExp

RegEx enabled jQuery.removeClass

(function($){
	$.fn._removeClass = $.fn.removeClass
	$.fn.removeClass = function(arg) {
		return this.each(function(){
			if(typeof(arg.test) == 'function'){
				var classes = $(this).attr('class').split(/\s/);
				$.each(classes,function(i){if(arg.test(this)){classes.splice(i,1)}});
				$(this).attr('class',classes.join(' '));
			}else{
				$(this)._removeClass(arg);
			}
		})
	};
})(jQuery)