一个假的页面载入效果代码(和真的差不多)!!!

CSS+JS打造类似QQ的网站导航菜单特效，网站上可以使用下！非常不错，强烈推荐下！

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>CSS+JS打造类似QQ的网站导航菜单特效</title>

body {font:12px Tahoma, sans-serif;color:#4D4D4D;margin:0px; text-align:center}

a{color:#4D4D4D;text-decoration:none}

a:hover{color:#AD0000;text-decoration:none}

#menu {width:160px;margin:0px;padding:0px;text-align:left;list-style:none;border:1px solid #B0D4ED}

#menu .item {margin:0px;padding:0px;list-style:none; text-align:center}

a.title:link,a.title:visited,a.title:hover {display:block;height:30px;line-height:30px; margin-top:1px;background:#E1F2FD;border-top:1px solid #B0D4ED;border-bottom:1px solid #B0D4ED;font-weight:bold;}

#menu .item ul {margin:0;list-style:none;display:none;text-align:center}

#menu .item ul li {height:24px;line-height:22px;border-bottom:1px solid #BFDBEE;margin:0 20px}

</style>

// --- 获取ClassName

document.getElementsByClassName = function(cl) {

var retnode = [];

var myclass = new RegExp('\\b'+cl+'\\b');

var elem = this.getElementsByTagName('*');

for (var j = 0; j < elem.length; j++) {

var classes = elem[j].className;

if (myclass.test(classes)) retnode.push(elem[j]);

}

return retnode;

}

// --- 隐藏所有

function HideAll() {

var items = document.getElementsByClassName("optiton");

for (var j=0; j<items.length; j++) {

items[j].style.display = "none";

}

// --- 设置cookie

function setCookie(sName,sValue,expireHours) {

var cookieString = sName + "=" + escape(sValue);

//;判断是否设置过期时间

if (expireHours>0) {

var date = new Date();

date.setTime(date.getTime + expireHours * 3600 * 1000);

cookieString = cookieString + "; expire=" + date.toGMTString();

}

document.cookie = cookieString;

}

//--- 获取cookie

function getCookie(sName) {

var aCookie = document.cookie.split("; ");

for (var j=0; j < aCookie.length; j++){

var aCrumb = aCookie[j].split("=");

if (escape(sName) == aCrumb[0])

return unescape(aCrumb[1]);

}

return null;

}

window.onload = function() {

var show_item = "opt_1";

if (getCookie("show_item") != null) {

show_item= "opt_" + getCookie("show_item");

}

document.getElementById(show_item).style.display = "block";

var items = document.getElementsByClassName("title");

for (var j=0; j<items.length; j++) {

items[j].onclick = function() {

var o = document.getElementById("opt_" + this.name);

if (o.style.display != "block") {

HideAll();

o.style.display = "block";

setCookie("show_item",this.name);

}

else {

o.style.display = "none";

}

</script>

</head>

<body>

<li class="item"><a href="javascript:void(0)" class="title" name="1">菜单选项一</a>

</ul>

</li>

<li class="item"><a href="javascript:void(0)" class="title" name="2">菜单选项二</a>

</ul>

</li>

<li class="item"><a href="javascript:void(0)" class="title" name="3">菜单选项三</a>

</ul>

</li>

<li class="item"><a href="javascript:void(0)" class="title" name="4">菜单选项四</a>

</ul>

</li>

</ul>

</body>

</html>