fix bug #412

public/self/dataset_preview.js

@@ -609,7 +609,7 @@ function showfilelist(){
   // filename_title = filename_title.substring(0,filename_title.lastIndexOf('.'))
   var filename_index = labeltastresult[0].pic_image_field.indexOf("/",70);
   filename_title = labeltastresult[0].pic_image_field.substring(filename_index + 1);
-  filename_title = filename_title.substring(0,fname.indexOf('/'))
+  filename_title = filename_title.substring(0,filename_title.indexOf('/'))
   var htmlstr = '';
   // htmlstr += '<div class="ui list">';
   htmlstr += '<div class="item" style="padding:1.2em;border-bottom:0;display: table;width: 100%;">'