<form action="&tr-url;"                                                         
      method="post"                                                             
      enctype="multipart/form-data">                                            
Enter a graphic file name (.gif or .jpeg):<br>                                  
<input type="file" name="tr-file" accept="image/gif, image/jpeg"><br>           
<input type="submit" name="submit" value="submit">                              
</form>