[imedia]

Игнорируется алерт и json выводится в элемент input

<form id="my_form" method="POST" action="/convers/upload_file/" >
        <input id="fileupload" type="file" name="files" >
</form>

var uploadButton = $('<button/>')
        .addClass('btn btn-primary')
        .text('Processing...')
		.on('click', function () {
		$('#my_form').submit();
		var busy = false
		function ajaxFormSubmit(){
		e.preventDefault();
		    if(busy) return false;
			busy = true;
			var $that = $('#my_form'),
			formData = new FormData($that.get(0));

			$.ajax({
			  url: $that.attr('action'),
			  type: $that.attr('method'),
			  contentType: false,
			  processData: false,
			  data: formData,
			  dataType: 'json',
			  success: function(json){
				alert(json)
				setTimeout(function(){busy = false;},1000);
			    }
			});
      
			}
			}) ;