Is there a graceful way to prevent a form from being submitted while there is a file uploading via RadAsyncUpload? I'm not fond of disabling the submit button or anything of that nature. I'm thinking more along the lines of allowing the submit button to be clicked, and a loading panel displays until the file is finished uploading and the form is submitted. I'm using ajax, so I need to use the AsyncUpload (otherwise I'd just use RadUpload and be done with it). Any suggestions?