图片放大方法一：
<style type="text/css">
.xt{ width:230px; height:230px;}
.tp{ width:230px; height:230px; overflow:hidden;}
.tp img{transition:all 1s ease-out 0s; margin-left:0px; margin-top:0px; perspective-origin:bottom;}
</style>
<body>
<div class="tp">
<img class="xt" onmouseover="Bian(this)" onmouseout="Hui(this)" src="c320_20160923147459793296513.jpg"/>
</div>
</body>
<script type="text/javascript">
function Bian(a)
{
a.style.marginTop = "-10px";
a.style.marginLeft = "-10px";
a.style.height=" 260px";
a.style.width= "260px";
}
function Hui(a)
{
a.style.height=" 230px";
a.style.width= "230px";
a.style.marginTop = "0px";
a.style.marginLeft = "0px";
}
</script>
图片放大方法二：（只调整鼠标样式实现图片放大）
<style type="text/css">
*{ margin:0px auto; padding:0px; font-size:15px; font-family:微软雅黑;}
#a{ width:300px; height:300px; margin-top:150px; overflow:hidden;}
.b{width:300px; height:300px; cursor:pointer; margin-top:0px; margin-left:0px; }
.b:hover{ width:350px; height:350px; margin-top:-25px; margin-left:-25px; transition: all 1s ease-in-out 0s; }
</style>
</head>
<body>
<div id="a">
<img class="b" src="a6.png" />
</div>
</body>
菜单栏的位置随滚轮移动固定方法：
<style type="text/css">
.t{ width:990px; height:80px; background-color:#F00; font-size:23px;}
</style>
<body>
<div style="width:100%; height:80px; background-color:#000; position:fixed;"></div>
<div style="width:200px; height:300px; background-color:#00F;"></div>
<div class="t"></div>
<div style="width:800px; height:1000px; background-color:#09F;"></div>
</body>
<script type="text/javascript">
$(document).ready(function(e)
{
var off=$(".t").offset(); //当前DIV离浏览器边框四边的距离
var of=off.top-160; //DIV离顶部的距离-本身DIV高度加顶部DIV高度的总高；（160PX视个人制作的DIV离上边框的距离而定）
$(window).scroll(function()
{
var scr=$(window).scrollTop(); //获取滚动条Y轴距离
if(scr>of)
{
$(".t").css("position","fixed");
$(".t").css("top","80px"); //根据需要调整
$(".t").css("background-color","#906"); //根据需要调整
$(".t").css("left","275px"); //根据需要调整
$(".t").css("width","800px"); //根据需要调整
$(".t").css("height","60px"); //根据需要调整
}
if(scr<of)
{
$(".t").css("position","absolute");
$(".t").css("top","230px"); //根据需要调整
$(".t").css("background-color","#F00"); //根据需要调整
$(".t").css("left","180px"); //根据需要调整
$(".t").css("width","990px"); //根据需要调整
$(".t").css("height","80px"); //根据需要调整
}
})
});