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javascript 新闻切换技术

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点击运行可以看到效果:

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<title>脚本之家www.jb51.net新闻切换技术</title>  
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.focusPic .more .textNum .num ul{ float:left; width:113px;}  
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<body>  
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var nn;  
nn=1;  
setTimeout('change_img()',6000);  
function change_img()  
{  
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function setFocus1(i)  
{  
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function selectLayer1(i)  
{  
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 document.getElementById("focusPic1").style.display="block";  
 document.getElementById("focusPic2").style.display="none";  
 document.getElementById("focusPic3").style.display="none";  
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 document.getElementById("focusPic2nav").style.display="none";  
 document.getElementById("focusPic3nav").style.display="none";  
 document.getElementById("focusPic4nav").style.display="block";  
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}  
</script>  
 <div class="focusPic">  
 <div id="focusPic1" style="display:block ;">  
 <div class="pic"> <a href="http://tech.163.com/special/000915SN/soft2005.html"><img src="http://cimg.163.com/tech/2006/1/18/2006011810122068706.jpg" alt="网易学院05年软件评选结果" width="240" height="180" border="0" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"></a> </div>  
 <h2><a href="http://tech.163.com/special/000915SN/soft2005.html">网易学院05年软件评选结果</a></h2>  
  
经过大家的热情投票和我们的辛劳整理，网易学院2005年年度软件评选结果终于出炉啦。点击进入查看……<img src="/newimg/i2.gif" alt="详细" width="3" height="5" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"> <a href="http://tech.163.com/special/000915SN/soft2005.html" class="cDRed">详细</a>  
 </div>  
 <div id="focusPic2" style="display: none ;">  
 <div class="pic"> <a href="http://tech.163.com/discover/"><img src="http://cimg.163.com/tech/2006/1/17/200601171557008cee7.jpg" alt="颠覆丛林动物生存法则" width="240" height="180" border="0" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"></a> </div>  
 <h2><a href="http://tech.163.com/discover/">颠覆丛林动物生存法则</a></h2>  
 群居动物的这种行为颠覆了我们通常认为的，在动物世界通行的 “丛林法则”，动物不都自私，不都是弱肉强食的。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"> <a href="http://tech.163.com/discover/" class="cDRed">详细</a>  
 </div>  
 <div id="focusPic3" style="display: none ;">  
 <div class="pic"> <a href="http://tech.163.com/special/00091MNJ/itobserve015.html"><img src="http://cimg.163.com/tech/2006/1/17/2006011711483290a60.jpg" alt="WAPI并非贸易阴谋" width="240" height="180" border="0" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"></a> </div>  
 <h2><a href="http://tech.163.com/special/00091MNJ/itobserve015.html">WAPI并非贸易阴谋</a></h2>  
 近日国家做出决定：“将向其他的国内及国外企业公布该算法”。事实证明中国WAPI标准并非是贸易阴谋。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"> <a href="http://tech.163.com/special/00091MNJ/itobserve015.html" class="cDRed">详细</a>  
 </div>  
 <div id="focusPic4" style="display: none ;">  
 <div class="pic"> <a href="http://tech.163.com/special/00091OSI/horizons.html"><img src="http://cimg.163.com/tech/2006/1/17/200601171002503f251.jpg" alt="新视野号探测冥王星特别专题" width="240" height="180" border="0" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"></a> </div>  
 <h2><a href="http://tech.163.com/special/00091OSI/horizons.html">新视野号探测冥王星特别专题</a></h2>  
 美国宇航局将于北京时间18日凌晨2时24分发射新视野号探测器，造访这颗人类唯一尚未探测过的行星-冥王星。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" / onclick="javascript:window.open(this.src);" style="CURSOR: pointer" onload="return imgzoom(this,550)"> <a href="http://tech.163.com/special/00091OSI/horizons.html" class="cDRed">详细</a>  
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 <div class="more">  
 <div class="textNum">  
 <div class="text">> 更多头图新闻</div>  
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 <li>1</li>  
 <li><a href="javascript:setFocus1(2);" target="_self">2</a></li>  
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 <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>  
 <li>2</li>  
 <li><a href="javascript:setFocus1(3);" target="_self">3</a></li>  
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 <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>  
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 </ul>  
 </div>  
 <div class="num bg4" id="focusPic4nav" style="display: none;">  
 <ul>  
 <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>  
 <li><a href="javascript:setFocus1(2);" target="_self">2</a></li>  
 <li><a href="javascript:setFocus1(3);" target="_self">3</a></li>  
 <li>4</li>  
 </ul>  
 </div>  
 </div>  
 </div>  
 </div>  
</body>  
</html>

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