Error message

• Notice: Undefined index: und in blk_left() (line 659 of /home/vietnamrailway/public_html/sites/all/modules/ticket_search/ticket_search.module).
• Notice: Undefined variable: html in blk_left() (line 673 of /home/vietnamrailway/public_html/sites/all/modules/ticket_search/ticket_search.module).
• Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in menu_set_active_trail() (line 2405 of /home/vietnamrailway/public_html/includes/menu.inc).