Submit a form in a popup, and then close the popup

Question

This seemed so trivial when I started off with it! My objective is this:

• When user clicks on a button, open up a form in a new window.
• Once the form is submitted, close the popup and return to the original page. The reverse order is fine too - i.e., I am okay if the popup is closed and then the form submits.

Here's how I'm doing this:

<form action="/system/wpacert" method="post" enctype="multipart/form-data" onsubmit="return closeSelf()" name="certform">
                <div>Certificate 1: <input type="file" name="cert1"/></div>
                <div>Certificate 2: <input type="file" name="cert2"/></div>
                <div>Certificate 3: <input type="file" name="cert3"/></div>

                <div><input type="submit" value="Upload"/></div>
            </form>

and the Javascript looks like this:

<script type="text/javascript">
function closeSelf(){
    self.close();
    return true;
}
</script>

This seems to work fine on IE8 and Chrome; but Firefox refuses to submit the form; it just closes the popup. What might I be doing wrong?

EDIT:

Had forgotten to post the code the opens the popup. Here it is:

<div><input type="submit" value="Upload Certificates" onclick="popupUploadForm()"/>

And the corresponding javascript:

function popupUploadForm(){
        var newWindow = window.open('/cert.html', 'name', 'height=500,width=600');
    }

Answer 1

I have executed the code in my machine its working for IE and FF also.

function closeSelf(){
    // do something

    if(condition satisfied){
       alert("conditions satisfied, submiting the form.");
       document.forms['certform'].submit();
       window.close();
    }else{
       alert("conditions not satisfied, returning to form");    
    }
}


<form action="/system/wpacert" method="post" enctype="multipart/form-data" name="certform">
       <div>Certificate 1: <input type="file" name="cert1"/></div>
       <div>Certificate 2: <input type="file" name="cert2"/></div>
       <div>Certificate 3: <input type="file" name="cert3"/></div>

       // change the submit button to normal button
       <div><input type="button" value="Upload"  onclick="closeSelf();"/></div>
</form>