[JavaScript] auto submit add & remove file attachment

[umetkaran]

when file selected, list(&size) file directly appear. without klik Add or Update Attachment button
and also
if list of file remove, after choose 'yes'. list file directly disapear without klik Update Attachment button

I've tried the following javascript metode to autoload/autosubmbit

onchange="this.form.submit()"

and

<script type="text/javascript">  
alert('hit');
$(function(){
    $("#fil1").change(function(){
        $("#editpost").submit();
    });
});
</script> 

but, not work

thanks

[umetkaran]

there anybody help? or sharing