rem: return parseFloat(Element.getStyle(element, "opacity")) || '1';    
add: return parseFloat(Element.getStyle(element, "opacity") || '1'); 
context: Element.getOpacity = function(element){  return parseFloat(Element.getStyle(element, "opacity")) || '1';  //  || Element.getStyle(element, "-moz-opacity")   //  || Element.getStyle(element, "-khtml-opacity")   //  || '1');}
meta: 4973	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4973/e8c39d48af400cd700cad64b8c66b855d356a5bc/util.js/buggy/src/util.js