getAttribute() in Firefox

Code running against live demo. Open IE/FF and browse to url:

http://demo10.qlikview.com/QvAJAXZfc/opendoc.htm?document=Online%20Sales.qvw&host=demo10&anonymous=true



IE returns excepted result but FF returs empty string.



function checkGetAttribute()

{ 

    var page = Sys.Process("firefox").Page("http://demo10.qlikview.com/QvAJAXZfc/opendoc.htm?document=Online%20Sales.qvw&host=demo10&anonymous=true"); 

    //var page = Sys.Process("iexplore").Page("http://demo10.qlikview.com/QvAJAXZfc/opendoc.htm?document=Online%20Sales.qvw&host=demo10&anonymous=true"); 



    props = ["className"]; 

    values = ["QvFrame"]; 



    QvFrames = page.FindAllChildren(props, values, 10); 

    QvFrames = QvFrames.toArray(); 



    cnt = QvFrames.length; 

    if (cnt > 0) 

    { 

        Log.Message(cnt + " object(s) were found:"); 

        for (i = 0; i < cnt; i++) 

        Log.Message(QvFrames.Name + " has TargetName = " + QvFrames.getAttribute("TargetName")); 

    } 

    else 

    { 

        Log.Message("No objects corresponding to the specified criteria were found."); 

    }

}