Reply To: css issue can anyone suggest me the right code

[reutorah]

thankyou paulie, just 2 pages remaining which are going out of the page.

tabs :

My Message : http://phpsunchat.com/chat/mymessage.php (want to show using 100% width keeping search box)
My Chatroom : http://phpsunchat.com/chat/mychatroom.php (want to show body or main content above like it opens in different screen resolutions.

example : https://gyazo.com/977d0aad110d961fe0c06ffb574b6ecb

demo details :
username : admin
password : admin123

thanks for helping once again.