CSS implementation of Google Chrome browser tab
What’s special about Google Chrome’s tabs is that the activated tab can “eat” part of the inactive tab next to it. This poses some challenges with CSS. As shown below:
Of course, the requirement is that only two images can be used, and the width is adaptive. The images used:
Normal tab background: 
Activated tab background: 
Code:
<!DOCTYPE HTML>
<head>
<title>google chrome tab</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
/*simple reset*/
*{padding:0px;margin:0px;}
/*clearfix*/
.clearfix:after {content: ".";display: block;height: 0;clear: both;visibility: hidden;}
.clearfix {display: inline-block;} /* for IE/Mac */
#tab { font-size:12px;margin-left:40px;_margin-left:60px;}/*由于li有margin-left:-15px;所以tab的margin-left>15px;*/
/*margin-left:-15px; 让当前元素“缩进”到前一个元素的右侧*/
#tab li{float:left; display:block; height:26px;position:relative;margin-left:-15px;_margin-left:-30px;z-index:1;}
#tab li a{color:#000; text-decoration:none; display:block;_float:left;_position:relative;_left:15px; height:26px;padding-left:30px;padding-right:15px; line-height:26px;margin-right:15px; background:url(normal.gif) no-repeat left top;}
/*i置于右边*/
#tab li i{position:absolute; right:0px;top:0px; width:15px;height:26px; z-index:3;background:url(normal.gif) no-repeat right top;}
/*当前激活的li在非激活之上(z-index)*/
#tab .active{z-index:2;top:1px; }
#tab .active a{background:url(active.gif) no-repeat left top; }
#tab .active i{background:url(active.gif) no-repeat -197px top;}
.content{clear:both;border:solid 1px #bcc5d1;}
</style>
</head>
<body>
<ul id="tab">
<li><a href="http://www.php1.cn/"> <li class="active"><a href="http://www.php1.cn/"> <li><a href="http://www.php1.cn/"></ul>
<div id="" class="content">
content
</div>
<script type="text/javascript">
//添加事件
var addHandler = window.addEventListener?
function(elem,event,handler){elem.addEventListener(event,handler,false);}:
function(elem,event,handler){elem.attachEvent("on"+event,handler);};
//实现.active切换
addHandler(window,"load",function(){
var arrLi = document.getElementById("tab").getElementsByTagName("li");
for (var i=0,l=arrLi.length;i<l ;i++ ){
(function(index){
addHandler(arrLi[index],"click",function(e){
var evt = (window.event||e),cur=evt.target||evt.srcElement;
for (var j=0,jl=arrLi.length;j<jl ;j++ ){
arrLi[j].className="";
}
((cur.tagName.toLowerCase()=="a")?cur.parentNode:cur).className="active";
try{cur.blur();cur.parentNode.blur();}catch(e){}
});
})(i);
}
});
</script>
</body>
</html>
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