function rtrim ( str, charlist ) {	// Strip whitespace (or other characters) from the end of a string
	// 
	// + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +	 input by: Erkekjetter
	// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	charlist = !charlist ? ' \s\xA0' : charlist.replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '\1ドル');
	var re = new RegExp('[' + charlist + ']+$', 'g');
	return str.replace(re, '');
}

rtrim(' Kevin van Zonneveld ');