Response from a hidden iframe is a new window

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>

<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>

Sco Title: <span id="scoTitle">${sessionScope.scoTitle}</span>&nbsp;

<div id="editorBody"/>

<iframe id="iFrame" name="iFrame" src=""></iframe>

<script language="javascript">

var newScoDescriptionHtml =
    "Palavras-Chave: <input type='text' id='sceneWordKey'/>"
  + "Descricao: <textarea id='sceneDescription'></textarea>"
  + "<input type='button' value='Avancar' onclick='javascript:addScoDescription()'>";
  
var scenesHtml =
    "<div id='editorScenes'>"
  + "<div id='editorScenesCreated'>"
  + "<span>Created Scenes:</span>"
  + "<span id='scenesList'/>"
  + "</div>"
  + "<div id='editorScenesNumber'> Number of Scenes:"
  + "<span id='currentScene'>99</span> / <span id='scenesCount'>99</span>"
  + "&nbsp;&nbsp;Number of Page: <span id='currentPage'>99</span>"
  + "<hr/></br>"
  + "<div id='editorScenesBody'>"
  + "<span id='sceneBody'></span>"
  + "</div></div></div>"

  + "<%-- Editor Command Buttons --%>"
  + "<div id='teste'><div id='buttonPanel'>"
  + "<span>Click on a button to create a new scene of a desired type</span><br/>"
  + "<input type='button' value='Text'      onclick='javascript:newTextScene()'/>"
  + "<input type='button' value='Media'     onclick='javascript:newMediaScene()'/>"
  + "<input type='button' value='New Page'  onclick='javascript:newPage()'/> </br>"  
  + "<input type='button' value='Finish'    onclick='javascript:finishSco()'/>"
  + "</div></div>";

var mediaScene =
    "<form name='UploadMedia' id='iframeForm' target='iFrame' action='/teobaldo2/UploadMedia.do' method='post' enctype='multipart/form-data'>"
  + "<input type='file' name='mediaFile'/>"
  + "<input value='ok' type='submit'/></form>";

var textScene = 
    "Scene Text:<textArea rows='3' cols='30' id='sceneText'></textarea>"
  + "<input value='ok' type='submit' onclick='javascript:saveTextScene()'/>";
</script>

<script language="javascript" src="js/ajax/ajax-base.js"></script>
<script language="javascript" src="js/ajax/scenes-sco-editor.js"></script>

// conters to control a sco editor
var scenesCount = 0, currentScene = -1, currentPage = 0;
// control a sceneBody
var newPageState = false, pageSceneBody = 0, sceneSceneBody = 0;
// state variables
var creatingScoDescription = true, creatingTextScene = false, 
    creatingMediaScene = false, sceneCreated = false;
// wordkey and description of the SCO
var wordkey = "", description = "";
// array of pages that contains in each position a scenes array
var pages = new Array();

// initialize the first page
newPage()

// makes sure the GUI starts correctly for the initial state
updateView();


/* updates the screen components acordingly to the editor state */
function updateView() {
    if ( creatingScoDescription ) {
        document.getElementById( "editorBody" ).innerHTML = newScoDescriptionHtml;
    } else {
        document.getElementById( "editorBody" ).innerHTML = scenesHtml;
        document.getElementById( "scenesCount" ).innerHTML = scenesCount;
        document.getElementById( "currentScene" ).innerHTML = currentScene + 1;
        document.getElementById( "currentPage" ).innerHTML = currentPage + 1;

        if ( creatingTextScene ) {
            document.getElementById( "sceneBody" ).innerHTML = textScene;
        } else if ( creatingMediaScene ) {
            document.getElementById( "sceneBody" ).innerHTML = mediaScene;
        } else if ( sceneCreated ) {
            if ( newPageState ) {
                pageSceneBody = currentPage - 1;
            } else {
                pageSceneBody = currentPage;
            }
            document.getElementById( "sceneBody" ).innerHTML = 
               "<pre>" + pages[pageSceneBody].scenes[sceneSceneBody].text + "</pre>";
        } else {
            // what is the default sceneBody ?
        }

        updateScenesList();
    }
}

function updateScenesList() {
    var html = "<ul>";
    for ( i = 0; i < pages.length; i++ ) {
        for ( j = 0; j < pages[i].scenes.length; j++ ) {
            html += "<li>" + pages[i].scenes[j].name + "</li>";
        }
    }
    html += "</ul>";

    document.getElementById( "scenesList" ).innerHTML = html;
}

function addScoDescription() {
    wordkey = document.getElementById( "sceneWordKey" ).value;
    description = document.getElementById( "sceneDescription" ).value;

    creatingScoDescription = false;

    updateView();
}

function newTextScene() {
    if ( creatingTextScene || creatingMediaScene ) {
        alert("Exists a scene in creation state.");
    } else {
        scenesCount++;

        clearState();
        creatingTextScene = true;

        updateView();
    }
}

function newMediaScene() {
    if ( creatingTextScene || creatingMediaScene ) {
        alert("Exists a scene in creation state.");
    } else {
        scenesCount++;

        clearState();
        creatingMediaScene = true;

        updateView();
    }
}

function saveTextScene() {
    var stringLength = "";
    var scene = new Object();

    scene.text = document.getElementById( "sceneText" ).value;

    for ( i = 0; i < pages[currentPage].scenes.length; i++ ) {
        stringLength += pages[currentPage].scenes[i].text;
    }

    if ( stringLength.length > 400 ) {
        alert( "Each page can't have more than 400 characters." );
    } else {
        scene.name = scene.text.substring( 0, 14 ) + "...";

        pages[currentPage].scenes[pages[currentPage].scenes.length] = scene;
        pages[currentPage].scenes[pages[currentPage].scenes.length].type = "text";
        currentScene++;

        clearState();
        sceneCreated = true;
        newPageState = false;
        sceneSceneBody = pages[currentPage].scenes.length -1;
    }
    
    updateView();
}

function saveMediaScene() {
    var scene = new Object();

    scene.text = document.getElementById( "sceneText" ).value;
}

function newPage() {
    if ( creatingTextScene || creatingMediaScene ) {
        alert("Exists a scene in creation state.");
    } else {
        currentPage = pages.length;
        pages[currentPage] = new Object();
        pages[currentPage].scenes = new Array();

        newPageState = true;

        updateView();
    }
}

// this function is activated in the page response's body onload of the mediaUpload form, 
// for setting the especifics values on scenes array
function mediaResponse() {
    alert("**The Page Response was openned**");
}

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>

<html><body onload="javascript:autoClose()">
<script>
  function autoClose() {
      mediaResponse();
      setTimeout("window.close()",1500);
  }
</script>
<center><div>UPLOAD SUCCESS</div></center>
</body></html>