his.findElementById = function (identifier, frame) { if (!frame) { frame = window; } var element = frame.document.getElementById(identifier); if (element && element.getAttribute('id') === identifier) { return element; } // else if (browserVersion.isIE || browserVersion.isOpera) { // // SEL-484 // var xpath = '/descendant::*[@id=' + identifier.quoteForXPath() + ']'; // return this // .findElementByXPath(xpath); // } else { // MOD 2011-12-9 有的新窗口中frame与老窗口相同。一般是先操作新窗口。从后向前找 if (frame.frames && frame.frames.length > 0) { for (var i = frame.frames.length - 1; i >= 0; i--) { element = this.findElementById(identifier, frame.frames[i]); //frames[i].document.getElementById(identifier); if (element && element.getAttribute("id") === identifier) { return element; } } } } return null; };