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');
	var re = new RegExp('[' + charlist + ']+$', 'g');
	return str.replace(re, '');
}