js代码
<script type="text/javascript"> $(window).scroll(function(){ //控制导航 if($(window).scrollTop()<100){ $('#headdiv').stop().animate({"top":"0px"},200); $('.logo').css("padding-top","20px"); $('.nav .mmm').css("padding-top","50px"); $('.nav .sub').css("top","125px"); $('.top02').css("height","95px"); }else{ $('#headdiv').stop().animate({"top":"-30px"},200); $('.top02').css("height","75px"); $('.logo').css("padding-top","3px"); $('.nav .mmm').css("padding-top","30px"); $('.nav .sub').css("top","75px"); } }); </script>