舒卷的菜单样式 _Web前端

伸缩的菜单样式
<html>
<head>
<title>伸缩的菜单</title>
<style type="text/css">
*{ margin:0; padding:0; font-family:Arial, Helvetica, sans-serif; font-size:12px;}
body{
	background-color:#ffdee0;
}
#navigation {
	width:200px;
	font-family:Arial;
}
#navigation ul {
	list-style-type:none;				/* 不显示项目符号 */
	margin:0px;
	padding:0px;
}
#navigation ul li {
	border-bottom:1px solid #ED9F9F;	/* 添加下划线 */
}
#navigation ul li a{
	display:block;						/* 区块显示 */
	padding:5px 5px 5px 0.5em;
	text-decoration:none;
	border-left:12px solid #711515;		/* 左边的粗红边 */
	border-right:1px solid #711515;		/* 右侧阴影 */
}
#navigation ul li a:link, #navigation ul li a:visited{
	background-color:#c11136;
	color:#FFFFFF;
}
#navigation ul li a:hover{		/* 鼠标经过时 */
	background-color:#990020;			/* 改变背景色 */
	color:#ffff00;						/* 改变文字颜色 */
}

/* 子菜单的CSS样式 */
#navigation ul li ul{
	list-style-type:none;
	margin:0px;
	padding:0px 0px 0px 0px;
}
#navigation ul li ul li{
	border-top:1px solid #ED9F9F;
}
#navigation ul li ul li a{
	display:block;
	padding:3px 3px 3px 0.5em;
	text-decoration:none;
	border-left:28px solid #a71f1f;
	border-right:1px solid #711515;
}
#navigation ul li ul li a:link, #navigation ul li ul li a:visited{
	background-color:#e85070;
	color:#FFFFFF;
}
#navigation ul li ul li a:hover{
	background-color:#c2425d;
	color:#ffff00;
}
#navigation ul li ul.myHide{	/* 隐藏子菜单 */
	display:none;
}
#navigation ul li ul.myShow{	/* 显示子菜单 */
	display:block;
}
</style>
<script language="javascript">
function change(){
	//通过父元素li，找到兄弟元素ul
	var oSecondDiv = this.parentNode.getElementsByTagName("ul")[0];
	//CSS交替更换来实现显、隐
	if(oSecondDiv.className == "myHide")
		oSecondDiv.className = "myShow";
	else
		oSecondDiv.className = "myHide";
}
window.onload = function(){
	var oUl = document.getElementById("listUL");
	var aLi = oUl.childNodes;	//子元素
	var oA;
	for(var i=0;i<aLi.length;i++){
		//如果子元素为li，且这个li有子菜单ul
		if(aLi[i].tagName == "LI" && aLi[i].getElementsByTagName("ul").length){
			oA = aLi[i].firstChild;	//找到超链接
			oA.onmouseover = change;
			oA.onmouseout = change;				//动态添加点击函数
		}
	}
}
</script>
</head>
<body>
<div id="navigation">
	<ul id="listUL">
		<li><a href="#">Home</a></li>
		<li><a href="#">News</a>
        	<ul class="myHide">
            	<li><a href="#">Lastest News</a></li>
                <li><a href="#">All News</a></li>
            </ul>
        </li>
		<li><a href="#">Sports</a>
        	<ul class="myHide">
            	<li><a href="#">Basketball</a></li>
                <li><a href="#">Football</a></li>
                <li><a href="#">Volleyball</a></li>
            </ul>        
        </li>
		<li><a href="#">Weather</a>
        	<ul class="myHide">
            	<li><a href="#">Today's Weather</a></li>
                <li><a href="#">Forecast</a></li>
            </ul>
        </li>
		<li><a href="#">Contact Me</a></li>
	</ul>
</div>
</body>
</html>