Added alt-texts for IE browser

program/include/main.inc

@@ -30,7 +30,7 @@ function rcmail_startup($task='mail')
 
   // check client
   $BROWSER = rcube_browser();
-  
+
   // load config file
   include_once('config/main.inc.php');
   $CONFIG = is_array($rcmail_config) ? $rcmail_config : array();

program/include/rcube_shared.inc

@@ -979,7 +979,7 @@ class select extends base_form_element
 // provide details about the client's browser
 function rcube_browser()
   {
-  global $HTTP_USER_AGENT;
+  $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
 
   $bw['ver'] = 0;
   $bw['win'] = stristr($HTTP_USER_AGENT, 'win');