HTML&CSS----练习隐藏导航栏（三级导航）
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HTML&CSS----练习隐藏导航栏（三级导航）
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<!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>無標題文檔</title>
<style type="text/css">
*
{
margin:0px;
padding:0px;}
#aa
{
height:40px;
width:90px;
top:80px;
left:200px;
background-color:#339;
position:absolute;
overflow:hidden;
text-align:center;
line-height:40px;
}
#bb
{
height:120px;
width:90px;
top:40px;
left:0px;
background-color:#3FC;
position:absolute;
}
table
{
height:120px;
width:90px;
border:0px;
text-align:center;
}
#cc
{
height:40px;
width:90px;
position:absolute;
left:0px;
top:0px;
overflow:hidden;
background-color:#6F6;
}
#dd
{
height:40px;
width:90px;
background-color:#666;
position:absolute;
left:90px;
top:0px;
}
#ee
{
height:40px;
width:90px;
position:absolute;
left:0px;
top:40px;
overflow:hidden;
background-color:#6F9;
}
#ff
{
height:40px;
width:90px;
background-color:#666;
position:absolute;
left:90px;
top:0px;
}
#gg
{
height:40px;
width:90px;
position:absolute;
left:0px;
top:80px;
overflow:hidden;
background-color:#F99;
}
#hh
{
height:40px;
width:90px;
background-color:#666;
position:absolute;
left:90px;
top:0px;
}
</style>
</head>
<body>
<div id="aa" onmouseover="over()" onmouseout="out()">新聞動態
<div id="bb">
<table cellpadding="0" cellspacing="0">
<tr>
<td height="40px" width="90px">
<div id="cc" onmouseover="over1()" onmouseout="out1()">場景
<div id="dd">講座</div></div></td></tr>
<tr><td height="40px" width="90px"><div id="ee" onmouseover="over2()" onmouseout="out2()">活動<div id="ff">比賽</div></div></td></tr>
<tr><td height="40px" width="90px"><div id="gg" onmouseover="over3()" onmouseout="out3()">雜談<div id="hh">項目</div></div></td></tr>
</table>
<script>
function over()
{
var a = document.getElementById("aa");
a.setAttribute("style","overflow:visible;background-color:yellow");}
function out()
{
var a = document.getElementById("aa");
a.setAttribute("style","overflow:hidden");
}
function over1()
{
var a = document.getElementById("cc");
a.setAttribute("style","overflow:visible;background-color:green");}
function out1()
{
var a = document.getElementById("cc");
a.setAttribute("style","overflow:hidden");
}
function over2()
{
var a = document.getElementById("ee");
a.setAttribute("style","overflow:visible;background-color:yellow");}
function out2()
{
var a = document.getElementById("ee");
a.setAttribute("style","overflow:hidden");
}
function over3()
{
var a = document.getElementById("gg");
a.setAttribute("style","overflow:visible;background-color:red");}
function out3()
{
var a = document.getElementById("gg");
a.setAttribute("style","overflow:hidden");
}
</script>
</div></div>
</body>
</html>
顯示效果：
鼠標沒有指向時：
鼠標指向“新聞動態”時：
鼠標指向“場景”時：
鼠標指向“活動”時：
鼠標指向“雜談”時：
總結
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