利用cookie记忆当前位置的防刷新导航

2024-09-05 12:20:06

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利用cookie记忆当前位置的防刷新导航条，主要向大家展示如何在Js中使用Cookies技术，用好了Cookies，会使你的Js技术更上一层楼。这个菜单就感觉不错，当你鼠标点击之后，重新刷新页面后它仍然是保留在原位置，好像带有记忆功能。

<!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=gb2312" /><title>cookie记忆-防刷新菜单</title><style>a{color:#5A73F3;text-decoration:none}body{background:#333;margin:30px;font-size:14px;}#menu li{float:left;height:25px;line-height:25px;list-style:none}#menu li a{padding:10px;}a:hover{background:#ccc;color:##3399FF}a.hover{height:25px;line-height:25px;background:red;color:#ffffff}a,area{blr:e-xpression(this.onFocus=this.blur())}:focus{-moz-outline-style:none;} </style></head><body><div id="menu">	<ul>	<li>我的菜单</li>	<li>网页模板</li>	<li>精品代码</li>	<li>设计素材</li>	<li>恢复初始</li>	</ul></div><script language="javascript">function changename(c,cl){	var d=document.getElementById("menu").getElementsByTagName("a");	if(!cl)	{		writeCookie("hovers",c,222);	}	c=readCookie("hovers")?readCookie("hovers"):c;	for(i=0;i<d.length;i++)	{		d[i].className=i==c?"hover":"";	}}function writeCookie(name, value, hours){  var expire = "";  if(hours != null)  {    expire = new Date((new Date()).getTime() + hours * 3600000);    expire = "; expires=" + expire.toGMTString();  }  document.cookie = name + "=" + escape(value) + expire;}function readCookie(name){  var cookieValue = "";  var search = name + "=";  if(document.cookie.length > 0)  {     offset = document.cookie.indexOf(search);    if (offset != -1)    {       offset += search.length;      end = document.cookie.indexOf(";", offset);      if (end == -1) end = document.cookie.length;      cookieValue = unescape(document.cookie.substring(offset, end))    }  }  return cookieValue;}function clear(){	writeCookie("hovers","",222);	document.location=document.location.href;}changename(0,1)</script></body></html>

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