JS implementation switch TAB page effect instance code

On the web < Head> Add the following code to the section

<style type="text/css">  
<!--  
BODY {  
PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: 12px; PADDING-BOTTOM: 0px; MARGIN: 0px auto; COLOR: black; LINE-HEIGHT: 150%; PADDING-TOP: 10px; BACKGROUND-COLOR: white; TEXT-ALIGN: center  
}  
.dis {  
DISPLAY: block  
}  
.undis {  
DISPLAY: none  
}  
#cntR {  
WIDTH: 302px  
}  
#NewsTop {  
CLEAR: both; MARGIN-BOTTOM: 16px  
}  
#NewsTop P {  
FLOAT: left; LINE-HEIGHT: 21px  
}  
#NewsTop P.topTit {  
FONT-WEIGHT: bold; WIDTH: 117px  
}  
#NewsTop P.topC0 {  
BACKGROUND: #dcdcdc; BORDER-LEFT: #f2f2f2 1px solid; WIDTH: 40px; CURSOR: pointer  
}  
#NewsTop P.topC1 {  
BACKGROUND: #c2130e; BORDER-LEFT: #f2f2f2 1px solid; WIDTH: 40px; COLOR: #fff  
}  
#NewsTop #NewsTop_tit {  
BORDER-BOTTOM: #c2130e 3px solid; HEIGHT: 21px  
}  
#NewsTop #NewsTop_cnt {  
PADDING-LEFT: 32px; BACKGROUND: url(//www.jb51.net/code/table/tab/o2007320133249.gif) no-repeat 12px 13px; LINE-HEIGHT: 26px; PADDING-TOP: 7px; HEIGHT: 260px; TEXT-ALIGN: left  
}  
#NewsTop #NewsTop_cnt A {  
COLOR: #666; TEXT-DECORATION: none  
}  
#NewsTop #NewsTop_cnt A:hover {  
COLOR: #c2130e; TEXT-DECORATION: underline  
}  
--> 
</style> 

On the web < Body> Add the following code to the section

<DIV id=cntR>  
<DIV id=NewsTop>  
<DIV id=NewsTop_tit>  
<P class=topTit> News rankings </P>  
<P class=topC0> domestic </P>  
<P class=topC0> The international </P>  
<P class=topC0> social </P>  
<P class=topC0> The network evaluation </P>  
</DIV>  
<DIV id=NewsTop_cnt><SPAN title="Don't delete me"></SPAN>  
<SPAN>  
<A href="//www.jb51.net "target = love> Script house </ A> <BR>  
<A href="http://play.jb51.net" target=_self> Home of players </A><BR>  
<A href="http://mingzi.jb51.net" target=_self> Personal name network </A><BR>  
<A href="http://office.jb51.net" target=_self>Office The home of </A><BR>  
<A href="http://sc.jb51.net" target=_self> The home of the material </A><BR>  
<A href="http://yueduqi.jb51.net" target=_self> Home of the reader </A><BR>  
<div align="right"><A href="//www.jb51.net" target=_self>...more</A></div>  
</SPAN>  
<SPAN>  
<A href="//www.jb51.net "target = love> Script house </ A> <BR>  
<A href="http://play.jb51.net" target=_self> Home of players </A><BR>  
<A href="http://mingzi.jb51.net" target=_self> Personal name network </A><BR>  
<A href="http://office.jb51.net" target=_self>Office The home of </A><BR>  
<A href="http://sc.jb51.net" target=_self> The home of the material </A><BR>  
<A href="http://yueduqi.jb51.net" target=_self> Home of the reader </A><BR>  
<div align="right"><A href="//www.jb51.net" target=_self>...more</A></div>  
</SPAN>  
<SPAN>  
<A href="//www.jb51.net "target = love> Script house </ A> <BR>  
<A href="http://play.jb51.net" target=_self> Home of players </A><BR>  
<A href="http://mingzi.jb51.net" target=_self> Personal name network </A><BR>  
<A href="http://office.jb51.net" target=_self>Office The home of </A><BR>  
<A href="http://sc.jb51.net" target=_self> The home of the material </A><BR>  
<A href="http://yueduqi.jb51.net" target=_self> Home of the reader </A><BR> 
<div align="right"><A href="//www.jb51.net" target=_self>...more</A></div>  
</SPAN>  
<SPAN>  
<A href="//www.jb51.net "target = love> Script house </ A> <BR>  
<A href="http://play.jb51.net" target=_self> Home of players </A><BR>  
<A href="http://mingzi.jb51.net" target=_self> Personal name network </A><BR>  
<A href="http://office.jb51.net" target=_self>Office The home of </A><BR>  
<A href="http://sc.jb51.net" target=_self> The home of the material </A><BR>  
<A href="http://yueduqi.jb51.net" target=_self> Home of the reader </A><BR> 
<div align="right"><A href="//www.jb51.net" target=_self>...more</A></div>  
</SPAN>  
</DIV>  
<SCRIPT>  
var Tags=document.getElementById('NewsTop_tit').getElementsByTagName('p');  
var TagsCnt=document.getElementById('NewsTop_cnt').getElementsByTagName('span');  
var len=Tags.length;  
var flag=1;//Modify the default value & NBSP;
for(i=1;i<len;i++){  
Tags[i].value = i;  
Tags[i].onmouseover=function(){changeNav(this.value)};  
TagsCnt[i].className='undis';  
}  
Tags[flag].className='topC1';  
TagsCnt[flag].className='dis';  
function changeNav(v){  
Tags[flag].className='topC0';  
TagsCnt[flag].className='undis';  
flag=v;  
Tags[v].className='topC1';  
TagsCnt[v].className='dis';  
}  
</SCRIPT>  
</DIV>  
</DIV>