function getSiblingFrame(window, name)
    {
      for(i = 0; i < window.parent.frames.length; i++)
      {
        if(window.parent.frames[i].name == name)
        {
            return window.parent.frames[i];
        }
      }
    }

    function showWindow(url,name,width,height)
    {
        var options = "width="+width+",height="+height+",scrollbar=yes,status=no,toolbar=no,directories=no,menubar=no,location=no,resizable=yes,left=100,top=100";
        var hwnd = open(url, name, options);
    }

    function popupWindow(newURL)
    {
        open(newURL);
    }

    function popupPDF(newURL)
    {
        showWindow(newURL , '', 720, 560);
    }

    function popupImage(newURL)
    {
        showWindow('showImage.jsp?targetURL='+ newURL , '', 720, 560);
    }