add: return res; 
context:     this._copyAttributes = function(htmlnode, xhtmlnode, valid) {        var name;        if (valid.contains('*')) {            // allow all attributes on this tag            this.attrFilters['*'](name, htmlnode, xhtmlnode);            return;        };                for (var i = 0; i < valid.length; i++) {            name = valid[i];            var filter = this.attrFilters[name];            if (filter) filter(name, htmlnode, xhtmlnode);        }    };
meta: 2380	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2380/a66c86479bb56fb3ba0bdc9c529feb15bcc74096/kupucontentfilters.js/clean/kupu/common/kupucontentfilters.js