关于导航的练习 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>竖型导航菜单演示</title>
    <style type="text/css">
        *{padding: 0;margin: 0; font-size: 14px;}
        ul{list-style: none;padding-left: 200px;height: 50px;border-bottom: 5px solid #F60;}
        ul li{float: left;margin-top: 20px;}
        a{display: block;text-decoration: none;height: 30px;line-height: 30px;width: 120px;background-color: #ccc;margin-bottom: 1px;text-align: center;border-radius: 10px 10px 0 0;}
        a:hover{background-color: #f60;color: #fff;margin-top: -10px;line-height: 40px;height: 40px;}
    </style>
    <script type="text/javascript">
        window.onload = function(){
            var aA = document.getElementsByTagName("a");
            for (var i = 0; i <aA.length; i++) {
                aA[i].onmouseover=function() {
                    clearInterval(this.time);
                    var This = this;
                    This.time = setInterval(function(){
                        This.style.width = This.offsetWidth+8+"px";
                        if (This.offsetWidth>=160) {
                            clearInterval(This.time);
                        }
                    },30);
                }
                aA[i].onmouseout=function() {
                    clearInterval(this.time);
                    var This = this;
                    This.time = setInterval(function(){
                        This.style.width = This.offsetWidth-8+"px";
                        if (This.offsetWidth<=120) {
                            This.style.width="120px";
                            clearInterval(This.time);
                        }
                    },30);
                }
            }
        }
    </script>
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posted @ 2016-04-13 09:55  Arther_J  阅读(171)  评论(0)    收藏  举报