function onSubmit(upload_id)
{
var hn = window.location.hostname;
var url = "http://"+hn+"/progressbar.php?progress_key="+upload_id;
var xmlhttp;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.open("GET",url,false);
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4)
    {
        if(xmlhttp.status==200){
            var percent = parseInt(xmlhttp.getResponseHeader("Percent"), 10);
            if(percent<100)
                {
                    document.getElementById('progress_overlay').style.display="block";
                    document.getElementById('progress_width').style.width=percent+"%";
                    document.getElementById('progress_width').innerHTML="";
                    document.getElementById('percent_word').innerHTML=percent+"%";
                    setTimeout(function(){ onSubmit(upload_id); }, 1);
                }
            else
                {
                    if(percent==100)
                    {
                        document.getElementById('progress_overlay').style.display="block";
                        document.getElementById('percent_word').innerHTML="Your file is being processed. Please wait.";
                        document.getElementById('progress_width').innerHTML="";
                        document.getElementById('progress_width').style.width=100+"%";
                    }
                    else{
                        document.getElementById('progress_overlay').style.display="block";
                        document.getElementById('progress_width').innerHTML="Progress Bar Error: Percent over 100";
                    }
                }
        }
        else{
            document.getElementById('progress_overlay').style.display="block";
            document.getElementById('progress_width').innerHTML="Progress Bar Error: Response code is "+xmlhttp.status;
        }
    }
  else
    {
        document.getElementById('progress_overlay').style.display="block";
        document.getElementById('progress_width').innerHTML="Progress Bar Error: Ready State is "+xmlhttp.readyState;
    }
  }
xmlhttp.send();
}
function checkForm(theForm, id) {
    if (theForm.tos.checked == false)
    {
        alert ('You need to accept the terms of use!');
        theForm.reset();
        return false;
    } else {
        onSubmit(id);
        theForm.submit();
    }
}