note 107885 added to function.session-start

I am facing this error, I need some help that how I can remove this ugly error from my website. Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in /home/eitlabs1/public_html/salmanoreen.com/libraries/joomla/session/session.php on line 423 Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in /home/eitlabs1/public_html/salmanoreen.com/libraries/joomla/session/session.php on line 423 Warning: Cannot modify header information - headers already sent by (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in ---- Server IP: 69.147.83.197 Probable Submitter: 119.154.118.198 ---- Manual Page -- http://www.php.net/manual/en/function.session-start.php Edit -- https://master.php.net/note/edit/107885 Del: integrated -- https://master.php.net/note/delete/107885/integrated Del: useless -- https://master.php.net/note/delete/107885/useless Del: bad code -- https://master.php.net/note/delete/107885/bad+code Del: spam -- https://master.php.net/note/delete/107885/spam Del: non-english -- https://master.php.net/note/delete/107885/non-english Del: in docs -- https://master.php.net/note/delete/107885/in+docs Del: other reasons-- https://master.php.net/note/delete/107885 Reject -- https://master.php.net/note/reject/107885 Search -- https://master.php.net/manage/user-notes.php