优化错误提示

app/views/files/index.html.erb

@@ -296,7 +296,7 @@
                     if (textStatus == 'success') {
                         eval(xhr.responseText);
                     } else if (textStatus == 'error') {
-                        alert('error');
+                        alert('An error has occurred');
                     }
                 });
     }
@@ -312,7 +312,7 @@
                     if (textStatus == 'success') {
                         eval(xhr.responseText);
                     } else if (textStatus == 'error') {
-                        alert('error');
+                        alert('An error has occurred');
                     }
                     ;
                 });
@@ -331,7 +331,7 @@
                     if (textStatus == 'success') {
                         eval(xhr.responseText);
                     } else if (textStatus == 'error') {
-                        alert('error');
+                        alert('An error has occurred');
                     }
                     ;
                 });
@@ -350,7 +350,7 @@
                             type: "POST"
                         });
                     } else if (textStatus == 'error') {
-                        alert('error');
+                        alert('An error has occurred');
                     }
                 });
     }