Index: lib/weblib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lib/weblib.php,v
retrieving revision 1.1020
diff -u -r1.1020 weblib.php
--- lib/weblib.php	9 Jan 2008 23:15:45 -0000	1.1020
+++ lib/weblib.php	10 Jan 2008 12:29:17 -0000
@@ -4172,9 +4172,10 @@
  * @param boolean $return if false, output the form directly, otherwise return the HTML as a string. 
  * @param string $tooltip a tooltip to add to the button as a title attribute.
  * @param boolean $disabled if true, the button will be disabled.
+ * @param string $jsconfirmmessage if not empty then display a confirm dialogue with this string as the question.
  * @return string / nothing depending on the $return paramter.
  */
-function print_single_button($link, $options, $label='OK', $method='get', $target='_self', $return=false, $tooltip='', $disabled = false) {
+function print_single_button($link, $options, $label='OK', $method='get', $target='_self', $return=false, $tooltip='', $disabled = false, $jsconfirmmessage='') {
     $output = '';
     $link = str_replace('"', '"', $link); //basic XSS protection
     $output .= '<div class="singlebutton">';
@@ -4196,7 +4197,11 @@
     } else {
         $disabled = '';
     }
-    $output .= '<input type="submit" value="'. s($label) ."\" $tooltip $disabled/></div></form></div>";
+    if ($jsconfirmmessage){
+    	$jsconfirmmessage = addslashes_js($jsconfirmmessage);
+    	$jsconfirmmessage = 'onclick="'.s('return confirm("'.$jsconfirmmessage.'");').'"';
+    }
+    $output .= '<input type="submit" value="'. s($label) ."\" $tooltip $disabled $jsconfirmmessage/></div></form></div>";
 
     if ($return) {
         return $output;