function getAttributeWithStyleHack(el, attr) {
        // As with getAttributeSimple there is a potential warning for custom attribtues in IE7.
        return attr.name !== "style" ? attr.value : el.style.cssText;
    }
Gets an attribute value with special hack for style attribute (see #4)

@param {Node} el
@param {Attr} attr
@return {String} an attribute value