Index: lang/en_utf8/access.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lang/en_utf8/access.php,v
retrieving revision 1.4
diff -u -r1.4 access.php
--- lang/en_utf8/access.php	9 Jun 2006 14:21:25 -0000	1.4
+++ lang/en_utf8/access.php	25 Aug 2006 16:54:52 -0000
@@ -15,6 +15,8 @@
 $string['accesshelp'] = 'Accessibility help';
 $string['accesskey'] = 'Access key, $a';
 $string['accessstatement'] = 'Accessibility statement';
+$string['activitynext'] = 'Next activity';
+$string['activityprev'] = 'Previous activity';
 $string['breadcrumb'] = 'Breadcrumb trail';
 $string['monthnext'] = 'Next month';
 $string['monthprev'] = 'Previous month';
Index: blocks/search_forums/block_search_forums.php
===================================================================
RCS file: /cvsroot/moodle/moodle/blocks/search_forums/block_search_forums.php,v
retrieving revision 1.16
diff -u -r1.16 block_search_forums.php
--- blocks/search_forums/block_search_forums.php	16 Mar 2006 11:47:38 -0000	1.16
+++ blocks/search_forums/block_search_forums.php	25 Aug 2006 16:54:51 -0000
@@ -10,7 +10,7 @@
     }
 
     function get_content() {
-        global $CFG;
+        global $CFG, $THEME;
 
         if($this->content !== NULL) {
             return $this->content;
@@ -27,11 +27,13 @@
         $advancedsearch = get_string('advancedsearch', 'block_search_forums');
 
         //Accessibility: replaced <input value=">" type="submit"> with button-embedded image.
+        check_theme_arrows();
+        
         $this->content->text  = '<div class="searchform">';
         $this->content->text .= '<form name="search" action="'.$CFG->wwwroot.'/mod/forum/search.php" style="display:inline">';
         $this->content->text .= '<input name="id" type="hidden" value="'.$this->instance->pageid.'" />';  // course
         $this->content->text .= '<input name="search" type="text" size="16" value="" />';
-        $this->content->text .= '<button type="submit" title="'.get_string('search').'"><img src="'.$CFG->pixpath.'/a/r_go.gif" alt="" class="resize" /><span class="accesshide">'.get_string('search').'</span></button><br />'; 
+        $this->content->text .= '<button type="submit" title="'.get_string('search').'">'. $THEME->rarrow .'<span class="accesshide">'.get_string('search').'</span></button><br />'; 
         $this->content->text .= '<a href="'.$CFG->wwwroot.'/mod/forum/search.php?id='.$this->instance->pageid.'">'.$advancedsearch.'</a>';
         $this->content->text .= helpbutton('search', $advancedsearch, 'moodle', true, false, '', true);
         $this->content->text .= '</form></div>';
Index: calendar/lib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/calendar/lib.php,v
retrieving revision 1.145
diff -u -r1.145 lib.php
--- calendar/lib.php	24 Jul 2006 00:15:54 -0000	1.145
+++ calendar/lib.php	25 Aug 2006 16:54:52 -0000
@@ -602,7 +602,7 @@
 }
 
 function calendar_top_controls($type, $data) {
-    global $CFG, $CALENDARDAYS;
+    global $CFG, $CALENDARDAYS, $THEME;
     $content = '';
     if(!isset($data['d'])) {
         $data['d'] = 1;
@@ -620,8 +620,9 @@
     $data['y'] = $date['year'];
 
     //Accessibility: calendar block controls, replaced <table> with <div>.
-    $nexttext = '<img src="'. $CFG->pixpath .'/a/r_next.gif" alt="'.get_string('monthnext','access').'" class="resize" />';
-    $prevtext = '<img src="'. $CFG->pixpath .'/a/r_previous.gif" alt="'.get_string('monthprev','access').'" class="resize" />';
+    check_theme_arrows();
+    $nexttext = $THEME->rarrow .'<span class="accesshide">'.get_string('monthnext','access').'</span>';
+    $prevtext = $THEME->larrow .'<span class="accesshide">'.get_string('monthprev','access').'</span>';
 
     switch($type) {
         case 'frontpage':
@@ -658,9 +659,9 @@
             $prevdate = make_timestamp($prevyear, $prevmonth, 1);
             $nextdate = make_timestamp($nextyear, $nextmonth, 1);
             $content .= '<div class="calendar-controls">';
-            $content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=month&amp;', 1, $prevmonth, $prevyear).'">&lt; '.userdate($prevdate, get_string('strftimemonthyear')).'</a></span>';
+            $content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=month&amp;', 1, $prevmonth, $prevyear)."\"> $THEME->larrow ".userdate($prevdate, get_string('strftimemonthyear')).'</a></span>';
             $content .= '<span class="hide"> | </span><span class="current">'.userdate($time, get_string('strftimemonthyear'))."</span>\n";
-            $content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=month&amp;', 1, $nextmonth, $nextyear).'">'.userdate($nextdate, get_string('strftimemonthyear'))." &gt;</a></span>\n";
+            $content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=month&amp;', 1, $nextmonth, $nextyear).'">'.userdate($nextdate, get_string('strftimemonthyear'))." $THEME->rarrow</a></span>\n";
             $content .= "<span class=\"clearer\"></span></div>\n";
         break;
         case 'day':
@@ -670,7 +671,7 @@
             $prevname = calendar_wday_name($CALENDARDAYS[$prevdate['wday']]);
             $nextname = calendar_wday_name($CALENDARDAYS[$nextdate['wday']]);
             $content .= '<div class="calendar-controls">';
-            $content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=day&amp;', $prevdate['mday'], $prevdate['mon'], $prevdate['year']).'">&lt; '.$prevname."</a></span>\n";
+            $content .= '<span class="previous"><a href="'.calendar_get_link_href('view.php?view=day&amp;', $prevdate['mday'], $prevdate['mon'], $prevdate['year'])."\">$THEME->larrow ".$prevname."</a></span>\n";
 
             // Get the format string
             $text = get_string('strftimedaydate');
@@ -684,7 +685,7 @@
             // Print the actual thing
             $content .= '<span class="hide"> | </span><span class="current">'.$text.'</span>';
 
-            $content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=day&amp;', $nextdate['mday'], $nextdate['mon'], $nextdate['year']).'">'.$nextname." &gt;</a></span>\n";
+            $content .= '<span class="hide"> | </span><span class="next"><a href="'.calendar_get_link_href('view.php?view=day&amp;', $nextdate['mday'], $nextdate['mon'], $nextdate['year']).'">'.$nextname." $THEME->rarrow</a></span>\n";
             $content .= "<span class=\"clearer\"></span></div>\n";
         break;
     }
Index: theme/standard/styles_color.css
===================================================================
RCS file: /cvsroot/moodle/moodle/theme/standard/styles_color.css,v
retrieving revision 1.101
diff -u -r1.101 styles_color.css
--- theme/standard/styles_color.css	8 Aug 2006 05:13:21 -0000	1.101
+++ theme/standard/styles_color.css	25 Aug 2006 16:54:53 -0000
@@ -196,6 +196,10 @@
  *** Header
  ***/
 
+.breadcrumb li span {
+  color:#aaa;
+}
+
 .headerskip a:link,
 .headerskip a:visited,
 .headerskip a:hover {
Index: theme/standard/config.php
===================================================================
RCS file: /cvsroot/moodle/moodle/theme/standard/config.php,v
retrieving revision 1.18
diff -u -r1.18 config.php
--- theme/standard/config.php	29 Mar 2005 14:20:11 -0000	1.18
+++ theme/standard/config.php	25 Aug 2006 16:54:53 -0000
@@ -121,9 +121,21 @@
 /// files from the moodle/pix directory, plus a
 /// "pix/mod" directory containing all the icons 
 /// for all the activity modules.
-////////////////////////////////////////////////////////////////////////////////
 
 
+///$THEME->rarrow = '&#x25BA;' //OR '&rarr;';
+///$THEME->larrow = '&#x25C4;' //OR '&larr;';
+///
+/// Accessibility: Right and left arrow-like characters are
+/// used in the breadcrumb trail, course navigation menu 
+/// (previous/next activity), calendar, and search forum block.
+///
+/// If the theme does not set characters, appropriate defaults
+/// are set by (lib/weblib.php:check_theme_arrows). The suggestions
+/// above are 'silent' in a screen-reader like JAWS. Please DO NOT
+/// use &lt; &gt; &raquo; - these are confusing for blind users.
+////////////////////////////////////////////////////////////////////////////////
+
 
 // These colours are not used anymore, so I've set them to 
 // bright green to help identify where they should be removed
Index: lib/weblib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lib/weblib.php,v
retrieving revision 1.614
diff -u -r1.614 weblib.php
--- lib/weblib.php	18 Aug 2006 07:29:19 -0000	1.614
+++ lib/weblib.php	25 Aug 2006 16:54:53 -0000
@@ -2498,25 +2498,53 @@
 }
 
 /**
- * Prints breadcrumbs links
+ * Tests whether $THEME->rarrow, $THEME->larrow have been set (theme/-/config.php).
+ * If not it applies sensible defaults.
+ *
+ * Accessibility: right and left arrow Unicode characters for breadcrumb, calendar,
+ * search forum block, etc. Important: these are 'silent' in a screen-reader 
+ * (unlike &gt; &raquo;), and must be accompanied by text.
+ * @uses $THEME
+ */
+function check_theme_arrows() {
+    global $THEME;
+    
+    if (!isset($THEME->rarrow) and !isset($THEME->larrow)) {
+        $THEME->rarrow = '&#x25BA;';
+        $THEME->larrow = '&#x25C4;';
+        if (FALSE !== strpos($_SERVER['HTTP_USER_AGENT'], 'Opera')) {
+            $THEME->rarrow = '&#x25B6;';
+            $THEME->larrow = '&#x25C0;';
+       }
+    }
+}
+
+/**
+ * Prints breadcrumb trail of links, called in theme/-/header.html
  *
  * @uses $CFG
- * @param string $navigation The breadcrumbs string to be printed
+ * @param string $navigation The breadcrumb navigation string to be printed
+ * @param boolean $return False to echo the breadcrumb string (default), true to return it.
+ * @param string $separator The breadcrumb trail separator. The default 0 leads to the use
+ *  of $THEME->rarrow, themes could use '&rarr;', '/', or '' for a style-sheet solution.
  */
-function print_navigation ($navigation, $return=false) {
-    global $CFG, $USER;
+function print_navigation ($navigation, $return=false, $separator=0) {
+    global $CFG, $THEME;
 
+    check_theme_arrows();
+    if (0 == $separator) {
+        $separator = '<span>'. $THEME->rarrow .'</span>';
+    } 
     $output = '';
 
     if ($navigation) {
-        //Accessibility: breadcrumb links now in a list, &raquo; replaced with image.
+        //Accessibility: breadcrumb links now in a list, &raquo; replaced with a 'silent' character.
         $nav_text = get_string('youarehere','access');
-        $output .= '<h2 class="accesshide">'.$nav_text.",</h2><ul>\n";
+        $output .= '<h2 class="accesshide">'.$nav_text."</h2><ul>\n";
         if (! $site = get_site()) {
             $site->shortname = get_string('home');
         }
-        $navigation = '<li title="'.$nav_text.'"><img src="'.$CFG->pixpath.'/a/r_breadcrumb.gif" class="resize" alt="" /> '
-            .str_replace('->', '</li><li title="'.$nav_text.'"><img src="'.$CFG->pixpath.'/a/r_breadcrumb.gif" class="resize" alt="" /> ', $navigation)."</li>\n";
+        $navigation = "<li>$separator ". str_replace('->', "</li>\n<li>$separator", $navigation) ."</li>\n";
         $output .= '<li class="first"><a target="'. $CFG->framename .'" href="'. $CFG->wwwroot.((!isadmin() && !empty($USER->id) && !empty($CFG->mymoodleredirect) && !isguest())
                                                                        ? '/my' : '') .'/">'. $site->shortname ."</a></li>\n". $navigation;
         $output .= "</ul>\n";  
@@ -3925,27 +3953,33 @@
             $previousmod = $mod;
         }
     }
+    //Accessibility: added Alt text, replaced &gt; &lt; with 'silent' character and 'accesshide' text.
+    check_theme_arrows();
+    
     if ($selectmod and $isteacher) {
-        $logslink = "<td><a target=\"$CFG->framename\" href=".
+        $logstext = get_string('alllogs');
+        $logslink = "<a title=\"$logstext\" target=\"$CFG->framename\" href=".
                     "\"$CFG->wwwroot/course/report/log/index.php?chooselog=1&amp;user=0&amp;date=0&amp;id=$course->id&amp;modid=$selectmod->cm\">".
-                    "<img border=\"0\" height=\"16\" width=\"16\" src=\"$CFG->pixpath/i/log.gif\" alt=\"\" /></a></td>";
+                    "<img class=\"icon log\" src=\"$CFG->pixpath/i/log.gif\" alt=\"$logstext\" /></a>";
 
     }
     if ($backmod) {
+        $backtext= get_string('activityprev', 'access');
         $backmod = "<form action=\"$CFG->wwwroot/mod/$backmod->mod/view.php\" target=\"$CFG->framename\">".
                    "<input type=\"hidden\" name=\"id\" value=\"$backmod->cm\" />".
-                   "<input type=\"submit\" value=\"&lt;\" /></form>";
+                   "<button type=\"submit\" title=\"$backtext\">$THEME->larrow<span class=\"accesshide\">$backtext</span></button></form>";
     }
     if ($nextmod) {
+        $nexttext= get_string('activitynext', 'access');
         $nextmod = "<form action=\"$CFG->wwwroot/mod/$nextmod->mod/view.php\" target=\"$CFG->framename\">".
                    "<input type=\"hidden\" name=\"id\" value=\"$nextmod->cm\" />".
-                   "<input type=\"submit\" value=\"&gt;\" /></form>";
+                   "<button type=\"submit\" title=\"$nexttext\">$THEME->rarrow<span class=\"accesshide\">$nexttext</span></button></form>";
     }
 
-    return '<table><tr>'.$logslink .'<td>'. $backmod .'</td><td>' .
+    return "<table><tr>\n<td>".$logslink .'</td><td>'. $backmod .'</td><td>' .
             popup_form($CFG->wwwroot .'/mod/', $menu, 'navmenu', $selected, $strjumpto,
                        '', '', true, $targetwindow).
-            '</td><td>'. $nextmod .'</td></tr></table>';
+            '</td><td>'. $nextmod ."</td>\n</tr></table>";
 }
 
 /**