帮忙看看:<!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>标题</title>
</head><style type="text/css">
body{ font:12px/22px "宋体"; color:#000;}
class1{ background:red;}
class2{ background:blue;}
#all{ width:200px;}
.all ul{list-style:none;}
.all ul li{ float:left; display:block; width:100px;}
</style>
<body><script language="javascript">
function Tab(j){
for(i=1,i<3 i++)
{
document.getElementById(tabi).style.display="block";
document.getElementById(tabi).className="classi";
}
}
</script>
<div class="all">
<ul>
<li><a href="#" onclick="Tab(1)">标签</a>1</li>
<li><a href="#"onclick="Tab(2)">标签</a>2</li>
</ul>
<div id="tab1">1111</div>
<div id="tab2" style="display:none">2222222222</div>
</div>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>标题</title>
</head><style type="text/css">
body{ font:12px/22px "宋体"; color:#000;}
class1{ background:red;}
class2{ background:blue;}
#all{ width:200px;}
.all ul{list-style:none;}
.all ul li{ float:left; display:block; width:100px;}
</style>
<body><script language="javascript">
function Tab(j){
for(i=1,i<3 i++)
{
document.getElementById(tabi).style.display="block";
document.getElementById(tabi).className="classi";
}
}
</script>
<div class="all">
<ul>
<li><a href="#" onclick="Tab(1)">标签</a>1</li>
<li><a href="#"onclick="Tab(2)">标签</a>2</li>
</ul>
<div id="tab1">1111</div>
<div id="tab2" style="display:none">2222222222</div>
</div>
</body>
</html>
function Tab(j){
for(var i=1;i<3;i++)
{
document.getElementById(tabi).style.display="block";
document.getElementById(tabi).className="classi"; } } </script>
document.getElementById("tab"+i).style.display="";
document.getElementById(("tab"+i).className="class"+i;
document.getElementById("tab"+(3-i)).style.display="none";
document.getElementById(("tab"+(3-i)).className="class"+(3-i); }
<script language="javascript">
function Tab(j){
for(i=1,i <3 i++)
{
if(i==j)continue;
document.getElementById("tab"+i).style.display="block";
document.getElementById("tab"+i).className="class"+i;
} } </script>
function Tab(j){
for(i=1,i <3 i++){
if(i==j){
document.getElementById("tab"+i).style.display="block";
document.getElementById("tab"+i).className="class"+i;
}
else{
document.getElementById("tab"+i).style.display="none";
document.getElementById("tab"+i).className="class"+i;
}}}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>标题 </title>
</head> <style type="text/css">
body{ font:12px/22px "宋体"; color:#000;}
class1{ background:red;}
class2{ background:blue;}
#all{ width:200px;}
.all ul{list-style:none;}
.all ul li{ float:left; display:block; width:100px;}
</style>
<body> <script language="javascript">
function Tabs(i){
document.getElementById("tab"+i).style.display="";
document.getElementById("tab"+i).className="class"+i;
document.getElementById("tab"+(3-i)).style.display="none";
document.getElementById("tab"+(3-i)).className="class"+(3-i);
}
</script>
<div class="all">
<ul>
<li> <a href="javascript:Tabs(1)">标签 </a>1 </li>
<li> <a href="javascript:Tabs(2)">标签 </a>2 </li>
</ul>
<div id="tab1">1111 </div>
<div id="tab2" style="display:none">2222222222 </div>
</div>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>标题 </title>
</head> <style type="text/css">
body{ font:12px/22px "宋体"; color:#000;}
.class1{ background:red;}
.class2{ background:blue;}
#all{ width:200px;}
.all ul{list-style:none;}
.all ul li{ float:left; display:block; width:100px;}
</style>
<body> <script language="javascript">
function Tab(j)
{
for(i=1; i <3; i++)
{
document.getElementById("tab" + i).className="class" + i;
if( i==j )
document.getElementById( "tab" + i).style.display="block";
else
document.getElementById( "tab" + i).style.display="none";
} } </script>
<div class="all">
<ul>
<li> <a href="#" onclick="Tab(1)">标签 </a>1 </li>
<li> <a href="#"onclick="Tab(2)">标签 </a>2 </li>
</ul> <br>
<div id="tab1">1111 </div>
<div id="tab2" style="display:none">2222222222 </div>
</div>
</body>
</html>
function Tabs(j){
for(i=1;i<3;i++){
if(i==j){
document.getElementById("tab"+i).style.display="block";
document.getElementById("tab"+i).className="class"+i;
}
else{
document.getElementById("tab"+i).style.display="none";
document.getElementById("tab"+i).className="class"+i;
}}}
</script>
body{ font:12px/22px "宋体"; color:#000;}
.class1{ background:red;} /*漏了.*/
.class2{ background:blue;} /*漏了.*/
#all{ width:200px;}
.all ul{list-style:none;}
.all ul li{ float:left; display:block; width:100px;}
</style>
<body> <script language="javascript">
function Tab(j){
for(i=1,i <3 i++) //这里错了,应该是for(i=1;i <3;i++)
{
document.getElementById(tabi).style.display="block";
document.getElementById(tabi).className="classi"; } } </script>
<div class="all">
<ul>
<li> <a href="#" onclick="Tab(1)">标签 </a>1 </li>
<li> <a href="#"onclick="Tab(2)">标签 </a>2 </li>
</ul>