I am trying to show the errors that can occur by uploading a file (file extension, size).

I am using an adapted version of Jquery Fiel Upload for Ruby on Rails.

I have the following javascript:

 

1.     <script type="text/javascript" charset="utf-8">
2.                   $(function () {
3.                       // Initialize the jQuery File Upload widget:
4.                       $('#fileupload').fileupload();
5.                       // 
6.                       // Load existing files:
7.                       $.getJSON($('#fileupload').prop('action'), function (files) {
8.                         var fu = $('#fileupload').data('fileupload'), 
9.                           template;
10.                         fu._adjustMaxNumberOfFiles(-files.length);
11.                         console.log(files);
12.                         template = fu._renderDownload(files)
13.                           .appendTo($('#fileupload .files'));
14.                         // Force reflow:
15.                         fu._reflow = fu._transition && template.length &&
16.                           template[0].offsetWidth;
17.                         template.addClass('in');
18.                         $('#loading').remove();
19.                       });
20.                 
21.                   });
22.             </script>

I need to define the parameters in 

1. `$('#fileupload').fileupload();`

 as told hier, so I thought of something like this but it does not work as I am not good at it at all =).

So, I need an alert message, if the file is not a jpg and if the size is too big.

1.      $('#fileupload').fileupload({
2.             dataType: "json"
3.             add: (e,data)->
4.               types = /(\.|\/)(jpg)$/i
5.             
6.               else
7.                  alert("#{file.name} is not a jpg file")
8.     
9.         });

 

Many thanks in advanced