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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>左右点击选项卡</title>
<style type="text/css">
#box{width:300px; margin:0 auto;}
#box input{ padding:4px 10px; background:#ccc; display:inline-block;}
#box input.on{ background:red;}
#box span{color:red; cursor:pointer;}
#box div{ width:298px; border:1px solid #000; display:none; height:200px;}
</style>
<script>
window.onload=function(){
var oBox=document.getElementById('box');
var oBtn=oBox.getElementsByTagName('input');
var oCon=oBox.getElementsByTagName('div');
var oPrev=document.getElementById('prev');
var oNext=document.getElementById('next');
var iNow=0;
for(var i=0;i<oBtn.length;i++){
oBtn[i].index=i;
oBtn[i].onmouseover=function(){
iNow=this.index;
tb();
}
}
oPrev.onclick=function(){
iNow--;
if(iNow==-1){
iNow=2;
}
tb();
}
oNext.onclick=function(){
iNow++;
if(iNow==3){
iNow=0;
}
tb();
}
function tb(){
for(var i=0;i<oBtn.length;i++){
oBtn[i].className='';
oCon[i].style.display='none';
}
oBtn[iNow].className='on';
oCon[iNow].style.display='block';
}
}
</script>
</head>
<body>
<div id="box">
<input type="button" value="菜单一" /><input type="button" value="菜单二" /><input type="button" value="菜单三" />
<span id="prev">←</span> <span id="next">→</span>
<div style="display:block">12121212</div>
<div>22222222222</div>
<div>33333333333</div>
</div>
</body>
</html>
