Disabling a field after submission

var userTitle;
NWF$(document).ready(function()
{  

 NWF$("#" + control).attr("disabled", true); //disable controls here for all users
 GetCurrentUsername();
}
);
function GetCurrentUsername()
{
 var ctxt = new SP.ClientContext.get_current();
 this.website = ctxt.get_web();
 this.currentUser = website.get_currentUser();
 ctxt.load(currentUser);
 ctxt.executeQueryAsync(Function.createDelegate(this, this.onSucceess), Function.createDelegate(this, this.onFail));
}
function onSucceess(sender, args)
{
 userTitle = currentUser.get_title();
 retrieveSPGroupMembers();
}
function retrieveSPGroupMembers()
{
 var clientContext = new SP.ClientContext.get_current();
 var colGroup = clientContext.get_web().get_siteGroups();
 var approverGroup = colGroup.getByName("Owners");
 this.colUsers = approverGroup.get_users();
 clientContext.load(colUsers);
 clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));
}
function onQuerySucceeded(sender, args)
{
 var userEnumerator = colUsers.getEnumerator();
  var userNames="";
  var userName="";
 while (userEnumerator.moveNext())
 {
  var oUser = userEnumerator.get_current();
  userName = oUser.get_title();
  userNames = userName + ";" +userNames;
  if(userName == userTitle)
  {
   var status = NWF$("#" + status).val();
   if(status == 'Submitted')
   {
      alert('success');
      NWF$("#" + control).attr("disabled", false); //enable controls here for logged in user who is part of Owner group
    }
  }
 }
}
function onQueryFailed(sender, args)
{
 alert('Request failed. ' + args.get_message() + '
' + args.get_stackTrace());
}