html - search button display unnormal -

http://run.xxmn.com/new/

the search button on top of site displays unnormal under ie8,chrome, lower search textbox. want top of search button can parallel search textbox . it's ok in ie7,6 , firefox. why? how alter it.thankyou

apply float: left search input , button. i'm not sure if solve problem entirely because can't test in ie right now.