高手请多多指教！Tab选项卡！

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>不规则TAB标签图片代码 - 酷80</title>
<style type="text/css">

</style>
</head>
<body style="text-align:center">
<script type="text/javascript">
function setTab03Syn ( i )
{
selectTab03Syn(i);
}

function selectTab03Syn ( i )
{
switch(i){
case 1:
document.getElementById("TabCon1").style.display="block";
document.getElementById("TabCon2").style.display="none";
document.getElementById("font1").style.color="#ffffff";
document.getElementById("font2").style.color="#000000";
break;
case 2:
document.getElementById("TabCon1").style.display="none";
document.getElementById("TabCon2").style.display="block";
document.getElementById("font1").style.color="#000000";
document.getElementById("font2").style.color="#ffffff";
break;
}
}</script><div class="tab">
<div id="bg" class="xixi1">
<div id="font1" class="tab1" onclick="setTab03Syn(1);document.getElementById('bg').className='xixi1'">标签1</div>
<div id="font2" class="tab2" onclick="setTab03Syn(2);document.getElementById('bg').className='xixi2'">标签2</div>
</div>
<div id="TabCon1">内容1</div>
<div id="TabCon2" style="display:none">内容2</div>
</div>
<p style="text-align:center; clear:both"><a href="http://www.cool80.com/">酷80收集整理</a></p>
</body>
</html>
这种是经过我修改的，但是这个效果不是我想要的，我想要的是两张图片点击选项卡的时候只能够显示一张背景！

解决方案 »

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>不规则TAB标签图片</title>
<style type="text/css">body{font-size: 12px;}.tab{margin-top:100px}#TabCon1{width:540px;height:60px;line-height:60px;border:#e6e6e6 1px solid;border-top-width:0;
}
#TabCon2{width:540px;height:60px;line-height:60px;border:#e6e6e6 1px solid;border-top-width:0;}
#TabCon3{width:540px;height:60px;line-height:60px;border:#e6e6e6 1px solid;border-top-width:0;}
#TabCon4{width:540px;height:60px;line-height:60px;border:#e6e6e6 1px solid;border-top-width:0;}
#TabCon5{width:540px;height:60px;line-height:60px;border:#e6e6e6 1px solid;border-top-width:0;}.xixi1{width:540px;height:29px;line-height:29px;background-image:url(images/news_bghover1.gif);background-repeat:repeat-y;cursor:pointer;}
.xixi2{width:540px;height:29px;line-height:29px;background-image:url(images/news_bghover2.gif);background-repeat:repeat-y;cursor:pointer;}
.xixi3{width:540px;height:29px;line-height:29px;background-image:url(images/news_bghover2.gif);background-repeat:repeat-y;cursor:pointer;}
.xixi4{width:540px;height:29px;line-height:29px;background-image:url(images/news_bghover2.gif);background-repeat:repeat-y;cursor:pointer;}
.xixi5{width:540px;height:29px;line-height:29px;background-image:url(images/news_bghover2.gif);background-repeat:repeat-y;cursor:pointer;}.tab1{width:96px;height:29px;line-height:29px;float:left;text-align:center;cursor:pointer; color:#FFF;}
.tab2{width:116px;height:29px;line-height:29px;float:left;text-align:center;cursor:pointer;color:#000;}
.tab3{width:96px;height:29px;line-height:29px;float:left;text-align:center;cursor:pointer; color:#000;}
.tab4{width:116px;height:29px;line-height:29px;float:left;text-align:center;cursor:pointer;color:#000;}
.tab5{width:96px;height:29px;line-height:29px;float:left;text-align:center;cursor:pointer; color:#000;}
</style>
</head>
<body style="text-align:center">
<script type="text/javascript">
function setTab03Syn ( i )
{
selectTab03Syn(i);
}

function selectTab03Syn ( i )
{
switch(i){
case 1:
document.getElementById("TabCon1").style.display="block";
document.getElementById("TabCon2").style.display="none";
document.getElementById("TabCon3").style.display="none";
document.getElementById("TabCon4").style.display="none";
document.getElementById("TabCon5").style.display="none";
document.getElementById("font1").style.color="#ffffff";
document.getElementById("font2").style.color="#000000";
document.getElementById("font3").style.color="#000000";
document.getElementById("font4").style.color="#000000";
document.getElementById("font5").style.color="#000000";
break;
case 2:
document.getElementById("TabCon1").style.display="none";
document.getElementById("TabCon2").style.display="block";
document.getElementById("TabCon3").style.display="none";
document.getElementById("TabCon4").style.display="none";
document.getElementById("TabCon5").style.display="none";
document.getElementById("font1").style.color="#000000";
document.getElementById("font2").style.color="#ffffff";
document.getElementById("font3").style.color="#000000";
document.getElementById("font4").style.color="#000000";
document.getElementById("font5").style.color="#000000";
break;
case 3:
document.getElementById("TabCon1").style.display="none";
document.getElementById("TabCon2").style.display="none";
document.getElementById("TabCon3").style.display="block";
document.getElementById("TabCon4").style.display="none";
document.getElementById("TabCon5").style.display="none";
document.getElementById("font1").style.color="#000000";
document.getElementById("font2").style.color="#000000";
document.getElementById("font3").style.color="#ffffff";
document.getElementById("font4").style.color="#000000";
document.getElementById("font5").style.color="#000000";
break;
case 4:
document.getElementById("TabCon1").style.display="none";
document.getElementById("TabCon2").style.display="none";
document.getElementById("TabCon3").style.display="none";
document.getElementById("TabCon4").style.display="block";
document.getElementById("TabCon5").style.display="none";
document.getElementById("font1").style.color="#000000";
document.getElementById("font2").style.color="#000000";
document.getElementById("font3").style.color="#000000";
document.getElementById("font4").style.color="#ffffff";
document.getElementById("font5").style.color="#000000";
break;
case 5:
document.getElementById("TabCon1").style.display="none";
document.getElementById("TabCon2").style.display="none";
document.getElementById("TabCon3").style.display="none";
document.getElementById("TabCon4").style.display="none";
document.getElementById("TabCon5").style.display="block";
document.getElementById("font1").style.color="#000000";
document.getElementById("font2").style.color="#000000";
document.getElementById("font3").style.color="#000000";
document.getElementById("font4").style.color="#000000";
document.getElementById("font5").style.color="#ffffff";
break;
}
}</script><div class="tab">
<div id="bg" class="xixi1">
<div id="font1" class="tab1" onClick="setTab03Syn(1);document.getElementById('bg').className='xixi1'">标签1</div>
<div id="font2" class="tab2" onClick="setTab03Syn(2);document.getElementById('bg').className='xixi2'">标签2</div>
        <div id="font3" class="tab3" onClick="setTab03Syn(3);document.getElementById('bg').className='xixi3'">标签3</div>
        <div id="font4" class="tab4" onClick="setTab03Syn(4);document.getElementById('bg').className='xixi4'">标签4</div>
        <div id="font5" class="tab5" onClick="setTab03Syn(5);document.getElementById('bg').className='xixi5'">标签5</div>
</div>
    <div id="TabCon1">内容1</div>
<div id="TabCon2" style="display:none">内容2</div>
     <div id="TabCon3" style="display:none">内容3</div>
<div id="TabCon4" style="display:none">内容4</div>
<div id="TabCon5" style="display:none">内容5</div>
</div>

</body>
</html>
此代码是本人写的！出现了问题！请多多指教！谢谢！这是点击的第一个选项卡效果！这是点击的第二个选项卡效果！之后的效果都和第二个效果一样！谢谢！
一个选项卡例子
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
    <title>选项卡</title>
    <style type="text/css">
    *{margin:0px;padiving:0px;}
    body{ padiving:0;font:12px "宋体"; height:100%; width:100%; }
    ul,li{ list-style-type:none;padding:0px;}
    .tabHeads{width:962px;height:31px;margin:100px auto 0px;background-color:#31E2B7; }
    .tabContents{width:960px;height:auto;margin:0px auto; border:1px solid #333;padding:0px; }
    .tabContents div{height:198px;line-height:25px;width:auto;padding:5px;overflow:auto;background-color:#eff;}
    .tabs{width:100px;height:25px;line-height:25px;margin:5px 2px 0px;border:1px solid #333;border-BOTTOM:none;text-align:center;display:inline;float:left;}
    .curTab{color:red;background-color:#eff; MARGIN-BOTTOM: -2px; POSITION: relative; height:26px;}
</style>
</head>
<body>
      <div class="tabHeads" id='tabHeads'>
            <ul>
                <li style="margin-left:50px;">新闻1</li>
                <li >新闻2</li>
                <li >新闻3</li>
                <li >新闻4</li>
                <li >新闻5</li>
                <li >新闻6</li>
            </ul>
        </div>
        <div id="tabContents" class="tabContents">
            <div >
                <textarea   rows=3 cols="20"></textarea>新闻1
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20">234656</textarea>新闻2a2
            </div>
            <div style="display:none;" >
                <textarea  rows=3 cols="20"></textarea>新闻3a3
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20"></textarea>新闻4
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20">234656</textarea>新闻5
            </div>
            <div  style="display:none;">
                <textarea  rows=3 cols="20"></textarea>新闻6
            </div>
        </div>

     <div class="tabHeads" id='tabHeads1'>
            <ul>
                <li style="margin-left:50px;">新闻1</li>
                <li >新sdfgsdfg闻2</li>
                <li >新闻3</li>
                <li >新sdfg闻4</li>
                <li >新sdfgs闻5</li>
                <li >新sdfg闻6</li>
            </ul>
        </div>
        <div id="tabContents1" class="tabContents">
            <div >
                <textarea   rows=3 cols="20"></textarea>新闻1
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20">234656</textarea>新闻2a2
            </div>
            <div  style="display:none;">
                <textarea  rows=3 cols="20"></textarea>新闻3a3
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20"></textarea>新闻4
            </div>
            <div style="display:none;">
                <textarea   rows=3 cols="20">234656</textarea>新闻5
            </div>
            <div style="display:none;" >
                <textarea  rows=3 cols="20"></textarea>新闻6
            </div>
        </div></body>
<script type="text/javascript"></script>
<script type="text/javascript">
if(typeof(HTMLElement) != "undefined")  // 给非IE 浏览器添加方法 contains
{
    HTMLElement.prototype.contains = function(obj)
    {
      while(obj != null &&  typeof(obj.tagName) != "undefined")
      {
            if(obj == this)
              return true;
            obj = obj.parentNode;
      }
            return false;
    };
} var $ = function (id,obj) {
    return 'string' == typeof(id) ? (obj||document).getElementById(id) : id;
};
var $$ = function (name,obj) {
    return 'string' == typeof(name) ? (obj||document).getElementsByTagName(name):name;
};  //选项卡类，头，内容，选中的索引，选中样式，默认样式，是否自动切换,切换时间间隔（毫秒）
function Tab(heads,contents,selectedIndex,curStyle,style,isAutoChange,space)
{
    if(heads && contents && heads.length　&& contents.length &&  heads.length==contents.length)
    {
        this.heads=heads;
        this.contents=contents;
    }else
    {
        alert("参数错误！");
        return;
    }
    this.selectedIndex = selectedIndex||0;
    this.curStyle=curStyle||"";
    this.style = style||"";
    this.isAutoChange=isAutoChange||false;
    this.space = space || 3000;
    this.timer=null;
    this.init();
}Tab.prototype.init=function()
{
    var obj = this;
    for(var i=0;i<obj.heads.length;i++)
    {
        obj.heads[i].index=i;
        obj.heads[i].onmouseover=function(){obj.setTab(this.index);if(obj.isAutoChange){clearInterval(obj.timer);}};
        if(obj.isAutoChange)
        {
             obj.contents[i].onmouseout=obj.heads[i].onmouseout=function(e){
                e = e||event;
                e = e.toElement || e.relatedTarget ; // IE toElement  FF:relatedTarget
               if(typeof(e)!="undefined" &&!this.contains(e)){clearInterval(obj.timer);obj.timer=setInterval(function(){obj.setTab(obj.selectedIndex=(++obj.selectedIndex)%obj.heads.length);},obj.space);}
            };            obj.contents[i].onmouseover=function(e){clearInterval(obj.timer);};
        }
    }
    if(obj.isAutoChange){obj.timer=setInterval(function(){obj.setTab(obj.selectedIndex=(++obj.selectedIndex)%obj.heads.length);},obj.space);}
    obj.setTab( obj.selectedIndex);
}
Tab.prototype.setTab=function(index)
{
     for(var i=0;i<this.heads.length;i++)
    {
        this.heads[i].className = i == index ? this.style+' '+this.curStyle :this.style;
        this.contents[i].style.display = i == index ? "block" : "none";
    }
    this.selectedIndex = index;
}
window.onload=function()
{
    var heads = $("tabHeads");
    var contents=$("tabContents");
    var tab1=new Tab($$('li',heads),getChilds(contents),0,'curTab','tabs');    var heads1 = $("tabHeads1");
    var contents1=$("tabContents1");
    var tab2=new Tab($$('li',heads1),getChilds(contents1),1,'curTab','tabs',true,1500);

};function getChilds(o)
{
    if(!o || !o.childNodes)return null;
    var r=[];
    for(var i=0;i<o.childNodes.length;i++){
      if(o.childNodes[i].tagName){r.push(o.childNodes[i]);}
    }
    return r;
}</script></html>