Index: attachment.htm
===================================================================
--- attachment.htm	(revision 6346)
+++ attachment.htm	(working copy)
@@ -103,7 +103,11 @@
 
       if (form.filename.value=="")
        form.filename.value = fname;
-      return true;
+      else
+          if(form.filename.value.lastIndexOf('.') < 0){
+            var extension = fname.substr(fname.lastIndexOf('.'), fname.length - fname.lastIndexOf('.'));
+            form.filename.value += extension; 
+          }      return true;
     }
 
 </script>
Index: image.htm
===================================================================
--- image.htm	(revision 6346)
+++ image.htm	(working copy)
@@ -85,6 +85,11 @@
 
       if (form.filename.value=="")
        form.filename.value = fname;
+      else
+          if(form.filename.value.lastIndexOf('.') < 0){
+            var extension = fname.substr(fname.lastIndexOf('.'), fname.length - fname.lastIndexOf('.'));
+            form.filename.value += extension; 
+          }
       return true;
     }
 </script>