效果图如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>New Web Project</title>
<style type="text/css">
#content {
width: 400px;
height: 200px;
}
#tab_bar {
width: 400px;
height: 20px;
float: left;
}
#tab_bar ul {
padding: 0px;
margin: 0px;
height: 20px;
text-align: center;
}
#tab_bar li {
list-style-type: none;
float: left;
width: 133.3px;
height: 20px;
background-color: gray;
}
.tab_css {
width: 400px;
height: 200px;
background-color: orange;
display: none;
float: left;
}
</style>
<script type="text/javascript">
var myclick = function(v) {
var llis = document.getElementsByTagName("li");
for(var i = 0; i < llis.length; i++) {
var lli = llis[i];
if(lli == document.getElementById("tab" + v)) {
lli.style.backgroundColor = "orange";
} else {
lli.style.backgroundColor = "gray";
}
}
var divs = document.getElementsByClassName("tab_css");
for(var i = 0; i < divs.length; i++) {
var divv = divs[i];
if(divv == document.getElementById("tab" + v + "_content")) {
divv.style.display = "block";
} else {
divv.style.display = "none";
}
}
}
</script>
</head>
<body>
<div id="content">
<div id="tab_bar">
<ul>
<li id="tab1" onclick="myclick(1)" style="background-color: orange">
tab1
</li>
<li id="tab2" onclick="myclick(2)">
tab2
</li>
<li id="tab3" onclick="myclick(3)">
tab3
</li>
</ul>
</div>
<div class="tab_css" id="tab1_content" style="display: block">
<div>页面一</div>
</div>
<div class="tab_css" id="tab2_content">
<div>页面二</div>
</div>
<div class="tab_css" id="tab3_content">
<div>页面三</div>
</div>
</div>
</body>
</html>