IFrame Not Talking To Parent Page

I'm working on a upload script that uses javascript, and a hidden iframe to upload the files. It all works up until the iframe finishes and needs to send the javascript function call back to the parent page, nothing happens, when it should hide the upload progress bar. I've searched and searched for the answer, along with trying different alternative to window.top.window, such as window.top, parent, and parent.document and so far nothing has worked, I've even tried the onLoad on the iframe with no success.

Parent Page function:
function stopUpload(success, ups, file){
var result = '';
var uploaded = '0';
if (success == 1){
result = '<span class="msg">The file was uploaded successfully!</span><br>';
uploaded = uploaded ++;
if (uploaded == document.getElementById('numflowers').value){
document.getElementById(finish).style.display = 'block'; .....
}}
else if (success == 2){
result = '<span class="msg">There was an error during file upload! The file has a size of 0</span><br> File: <input name="ufile[]" id="ufile[]" type="file" size="30"> <input type="submit" name="submitBtn" value="Upload">';
}else if (success == 3){
result = '<span class="msg"> We only allow .png, .jpg, .gif, .zip, .rar, and .7z files to be uploaded. If you think we should allow other please make a suggestion on the forums.</span><br> File: <input name="ufile[]" id="ufile[]" type="file" size="30"> <input type="submit" name="submitBtn" value="Upload">';
}
var uploadp = "upload_process" + ups;
var uploadf = "upload_form" + ups;
document.getElementById('uploadp').style.display = 'none';
document.getElementById('uploadf').innerHTML = 'result';
document.getElementById('uploadf').style.display = 'block';
}
Function call inside iframe (example)
window.top.window.stopUpload(3, 1, test.txt)