design issue in resolution 1336 768 and 1024 768

 i haqve screen shot of web page in design mode & in browser but not able to attach here the screen shot is taken in resolution 1336 * 768 but the same web paeg works fine as per the design in the browser also in 1024 *768 resolution how do i rectify the degin so that it works fine in all resolutions similarly i have issues with displaying text with the different resolutions in 1024 *768 resolution the text appears properly as stateed ie centered but in 1336 * 768 the text appeasr to left