0 ){ $("#banner_main").slide({ titCell:".hd ul", mainCell:"#banner ul", autoPlay:true, autoPage:true, delayTime:500, effect:"left"}); $(window).resize(function() { CenterBanner(); }); $(document).ready(function(e) { CenterBanner(); }); }else{ $("#banner_main").hide(); } function CenterBanner(){ var imgWidth = parseInt( $(".bannerlist li img:first").width() ); if( imgWidth <= 0 ) return; var winWidth = parseInt( $(window).width() ); var offset = parseInt( (winWidth-imgWidth)/2 ); $(".bannerlist li img").css("margin-left", offset+"px" ); }