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JS uses cookies to remember the current location's anti-refresh navigation effect

PHPzforward: 2016-05-16 15:36:321142browse

This article mainly introduces the anti-refresh navigation effect of JS using cookies to remember the current location. It involves related techniques of JavaScript operating cookies and navigation style layout. It has certain reference value. Friends in need can refer to it. The details are as follows:

Here is a demonstration of the anti-refresh navigation bar that uses cookies to remember the current position. It mainly shows you how to use Cookies technology in JS. If you use Cookies well, your JS technology will be taken to the next level. This menu feels good. After you click the mouse, it will still remain in the original position after refreshing the page, as if it has a memory function.

A screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/ js/2015/js-cookie-nav-pos-menu-demo/

The specific code is as follows:

<!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>
<p id="menu">
  <ul>
  <li><a href="javascript:void(0)" class="hover" onclick="changename(0)" hidefocus="true">我的菜单</a></li>
  <li><a href="javascript:void(0)" onclick="changename(1)" hidefocus="true">网页模板</a></li>
  <li><a href="javascript:void(0)" onclick="changename(2)" hidefocus="true">精品代码</a></li>
  <li><a href="javascript:void(0)" onclick="changename(3)" hidefocus="true">设计素材</a></li>
  <li><a href="javascript:clear();" hidefocus="true">恢复初始</a></li>
  </ul>
</p>
<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>

The above is the entire content of this chapter. For more related tutorials, please Visit JavaScript Video Tutorial!

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