Having problem in visible/hidden

I am using same script under two subform section 1 and section 2. When click on button under section1, this script is working well, but section 2 not working.

Again if I click on the button section 2, it is working well, but section 1 not working then. Each section withstand other section. I have seen presence action get corrupted.

var sec = xfa.resolveNodes("images.thumb[*]");

outer:

for(var i=0; i<sec.length; i++)

    {

    if(sec.item(i).thum.rawValue == null)

        {

        if (event.target.importDataObject("name"))

        {

            var attachmentObject = event.target.getDataObject("name");

            var filetype = attachmentObject.path.substring(attachmentObject.path.lastIndexOf("." ) + 1);

            if (filetype === "jpg" || filetype === "JPEG" || filetype === "png" || filetype === "bmp" || filetype === "JPG")

            {

                var imageStream = event.target.getDataObjectContents("name");

                var imageStreamEncoded = Net.streamEncode(imageStream, "base64");

                sec.item(i).presence = "visible";

                sec.item(i).thum.rawValue = util.stringFromStream(imageStreamEncoded);

                break;

            }

            else {app.alert("Please insert correct format image");}

        }

        else { break outer;} //if cancel

    }   

}

What should I do now?