宽度可以伸缩的选项卡，来自网易

答案：<html>
<head>
<TITLE>宽度伸缩选项卡</TITLE>
<style>
HTML,BODY {
	margin:30px;padding:0;border:none;font-size:14px
}
.wrap {
	width:300px; BORDER: #b7c5d9 1px solid;BACKGROUND: #f0f6f9
}
.a10 {
	FONT-WEIGHT: bold; COLOR: #0099cc;  TEXT-DECORATION: none;
}
.a10:hover {
	COLOR: #bb2233; TEXT-DECORATION: underline
}
.md-head {
	PADDING-LEFT: 0px; LINE-HEIGHT: 38px; HEIGHT: 38px
}
.md-head A {
	BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 1px; FLOAT: left; BORDER-BOTTOM-WIDTH: 1px; MARGIN-LEFT: -1px; WIDTH: 76px; BACKGROUND-COLOR: #fff; TEXT-ALIGN: center; BORDER-RIGHT-WIDTH: 0px
}
.md-head A.wid {
	WIDTH: 148px
}
.md-head A.cur {
	 BORDER-BOTTOM-WIDTH: 0px; COLOR: #000; BACKGROUND-COLOR: #f0f6f9; TEXT-DECORATION: none
}
.md-body {
	padding:15px;ZOOM: 1
}
a,area { blr:e-xpression(this.onFocus=this.blur()) }
:focus { -moz-outline-style: none; } 
</style>
</HEAD>
<BODY>
<DIV class="wrap" id=divspacerank>
     <DIV class=md-head id=blogs_spacerank>
     <A class="a10 wrap cur wid" id=blogs_spacerank_tab_0 hideFocus onClick="blogs_spacerank_ck(0);return false;" href="#">今天</A> 
     <A class="a10 wrap" id=blogs_spacerank_tab_1 hideFocus onClick="blogs_spacerank_ck(1);return false;" href="#">72小时</A> 
     <A class="a10 wrap" id=blogs_spacerank_tab_2 hideFocus onClick="blogs_spacerank_ck(2);return false;" href="#">一周排行</A> <BR class=clear>
     </DIV>
     <DIV class=md-body>
          <DIV id=blogs_spacerank_0>
               今日更新
          </DIV>
          <DIV id=blogs_spacerank_1 style="DISPLAY: none">
                72小时
         </DIV>
         <DIV id=blogs_spacerank_2 style="DISPLAY: none">
                一周排行
         </DIV>
	</DIV>
</DIV>
<SCRIPT>
	 var blogs_spacerank_index = 0,blogs_spacerank_class = 'a10 wrap ';
	 var blogs_spacerank_list = document.getElementById('blogs_spacerank').getElementsByTagName('a');
	 function blogs_spacerank_ck(_idx){
		blogs_spacerank_list[blogs_spacerank_index].className = blogs_spacerank_class;
		blogs_spacerank_list[_idx].className = blogs_spacerank_class + ' cur wid';
		document.getElementById('blogs_spacerank_'+blogs_spacerank_index).style.display = 'none';
		document.getElementById('blogs_spacerank_tab_'+blogs_spacerank_index).innerHTML = document.getElementById('blogs_spacerank_tab_'+blogs_spacerank_index).innerHTML.replace("空间排行","");
		document.getElementById('blogs_spacerank_'+_idx).style.display = 'block';
		document.getElementById('blogs_spacerank_tab_'+_idx).innerHTML = document.getElementById('blogs_spacerank_tab_'+_idx).innerHTML+"空间排行";
		blogs_spacerank_index = _idx;
	 }													
</SCRIPT>
</body>
</html>
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