--- moodle/question/type/multichoice/display.html.original	2006-12-15 03:03:51.000000000 +0100
+++ moodle/question/type/multichoice/display.html	2009-10-14 11:04:29.000000000 +0200
@@ -28,6 +28,21 @@
         </td>
       </tr>
     <?php } ?>
+	<?php if (!$options->readonly and $question->options->single) { ?>
+		<tr>
+			<td colspan=2><br />
+			    <input type=button value="<?php print_string('noresponse', 'quiz') ?>" onClick='blankresponse(<?php echo $question->name_prefix ?>)'>
+				<script>
+					function blankresponse(resp) {
+					        for (var i=0;i<resp.length;i++)
+					        {
+					            resp[i].checked=false;
+					        }
+					}
+				</script>
+			</td>
+		</tr>
+	<?php } ?>
   </table>
   <?php if ($feedback) { ?>
     <div class="feedback">


--- moodle/question/type/truefalse/display.html.original	2007-07-07 04:10:00.000000000 +0200
+++ moodle/question/type/truefalse/display.html	2009-10-14 11:02:15.000000000 +0200
@@ -20,6 +20,20 @@
         <?php echo $radiofalse ?>
         <?php echo $falsefeedbackimg; ?>
     </span>
+    <?php if (!$options->readonly) { ?>
+	    <span>
+	        <br />
+		    <input type=button value="<?php print_string('noresponse', 'quiz') ?>" onClick='blankresponse(<?php echo $question->name_prefix ?>)'>
+		    <script>
+		        function blankresponse(resp) {
+		                for (var i=0;i<resp.length;i++)
+		                {
+		                    resp[i].checked=false;
+		                }
+		        }
+		    </script>
+	    </span>
+    <?php } ?>
   </div>
     <?php if ($feedback) { ?>
         <div class="feedback">


--- moodle/question/type/multianswer/questiontype.php.original	2009-02-14 00:06:11.000000000 +0100
+++ moodle/question/type/multianswer/questiontype.php	2009-10-16 09:06:21.000000000 +0200
@@ -531,8 +531,26 @@
                     <?php } ?>
                       </tr>
                   </table>
-                  <?php }  
-                        
+                  <?php }
+                      // Modificat per Equip Campus
+                        if ($wrapped->options->layout == 1 || $wrapped->options->layout == 2){
+                            echo "<div style='clear:both;'>";
+                            if (!$options->readonly and $wrapped->options->single) {
+                                ?>
+                                <input type=button value="<?php print_string('noresponse', 'quiz') ?>" onClick='blankresponse(<?php echo $inputname ?>)'>
+                                <script>
+                                    function blankresponse(resp) {
+                                            for (var i=0;i<resp.length;i++)
+                                            {
+                                                resp[i].checked=false;
+                                            }
+                                    }
+                                </script>
+                                <?php
+                            }
+                            echo "</div>";
+                        }
+
                     }else {
                         echo "no valid layout";
                     }