add: return !!val; 
context:             this['http-equiv'] = function(name, htmlnode, xhtmlnode) {                var val = htmlnode.httpEquiv;                if (val) xhtmlnode.setAttribute('http-equiv', val);            };
meta: 2380	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2380/a66c86479bb56fb3ba0bdc9c529feb15bcc74096/kupucontentfilters.js/clean/kupu/common/kupucontentfilters.js