How to change regExp, add whiteAttr?

Question

JavaScript

String.prototype.sanitizeHTML=function (white,black) {
   if (!white) white="b|i|p|br";
   if (!black) black="script|object|embed";
   var e=new RegExp("(<("+black+")[^>]*>.*</\\2>|(?!<[/]?("+white+")(\\s[^<]*>|[/]>|>))<[^<>]*>|(?!<[^<>\\s]+)\\s[^</>]+(?=[/>]))", "gi");
   return this.replace(e,"");
}

It is necessary to add a list of allowed attributes, so that they are not deleted, tell me how to change regExp?