h5+css 菜单导航---改变宽度_css下拉菜单改变菜单的宽度-优快云博客

本文链接：https://blog.youkuaiyun.com/baidu_32731497/article/details/51814847

本文介绍如何利用JavaScript脚本动态改变HTML5菜单导航的宽度，提供了一种实现方式并附带了实际效果展示。

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菜单导航—改变宽度

1、使用javascript脚本实现：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>导航菜单</title>
<style type="text/css">
* { margin: 0; padding: 0; font-size: 14px; }
a { color: #333; text-decoration: none }
ul { list-style: none; height: 30px; border-bottom: 5px solid #F60; margin-top: 20px; padding-left: 50px; }
ul li { float: left }
ul li a { display: block; height: 30px; text-align: center; line-height: 30px; width:120px; background: #efefef; margin-left: 1px; }
a.on, a:hover { background: #F60; color: #fff; }
</style>
<script>
window.onload=function()
{
    var as = document.getElementsByTagName("a");
    for(var i=0; i<as.length; i++)
    {
        as[i].onmouseover=function()
        {
          var this1 = this;
          clearInterval(si);
          var si = setInterval
          (
              function()
              {
                  this1.style.width = this1.offsetWidth+10+"px";
                  if(this1.offsetWidth>160)
                  {
                      clearInterval(si);
                  }
              },30);
        }
        as[i].onmouseout = function()
        {
            var this2 = this;
            clearInterval(si);
            var si = setInterval
            (
                function()
                {
                    this2.style.width=this2.offsetWidth-10+"px";
                    if(this2.offsetWidth<120)
                    {
                        clearInterval(si);
                    }
                },30);
        }
    }
}
</script>
</head>
<body>
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</body>
</html>