diff -Nur zabbix-2.0.5/acknow.php zabbix-2.0.5-focus_ack/acknow.php
--- zabbix-2.0.5/acknow.php	2013-02-21 11:06:18.706829279 +0100
+++ zabbix-2.0.5-focus_ack/acknow.php	2013-04-26 14:39:13.519746741 +0200
@@ -212,5 +212,6 @@
 }
 $frmMsg->addItemToBottomRow(new CButtonCancel(url_param('backurl').url_param('eventid').url_param('triggerid').url_param('screenid')));
 $frmMsg->show(false);
+zbx_add_post_js(' jQuery(document).ready(function() {jQuery("#message").focus();});');
 
 require_once dirname(__FILE__).'/include/page_footer.php';