有仿照一个网站的功能做导航，但是我的导航中就有一栏产品中心下面用隐藏个div然后鼠标放上去就显示出来,但是导航那一块div一直出不来，什么都没有，不知道是什么原因？
下面是页面的代码：
<!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=gb2312" />
<title>无标题文档</title>
<style>#c:mouseover div:cp{display:block;}
#nvigate li{float:left;line-height:30px;margin-left:4px;width:100px;text-align:center;}
.indexF, .indexP{float:left;width:105px;}
.indexFbg{display:none;height:210px;margin:45px 0 0 -202px;position:absolute;width:800px;border:1px #FF0000 solid;}
</style>
<script language="javascript">
function show(id){
document.getElementById(id).style.display='block';
}
function none(id){
document.getElementById(id).style.display='none';
}
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
</script>
</head>
<body>
<div id="box">
<div id="top"><>
<div id="t_1"><>
<img src="img/t_1.jpg" width="1004" height="120" />
</div>
<div id="t_2"><>
</div>
<div id="i_flash"><>
<img src="img/i_flash.jpg" width="1004" height="222" />
</div>
<div id="nvigate"><>
<div onmouseout="none('zcstFbg');MM_swapImgRestore()" onmouseover="show('zcstFbg');MM_swapImage('zcstF','','../img/i/cd1_10.jpg',1)"><>
<div id="zcstFbg" >
<div>
<img src="img/i_flash.jpg" width="713" height="195" border="0" usemap="#mapsXtjc"/>
<map name="mapsXtjc" id="mapsXtjc">
<area shape="rect" coords="559,46,626,63" href="http://www.zcst.net/Tec_1.html" />
<area shape="rect" coords="559,73,627,90" href="http://www.zcst.net/Tec_2.html" />
<area shape="rect" coords="559,124,625,141" href="http://www.zcst.net/Tec_4.html" />
<area shape="rect" coords="559,98,626,115" href="http://www.zcst.net/Tec_3.html" />
</map>
</div>
</div>
</div>
</div>
<div id="pmd">
<marquee behavior="scroll">跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯</marquee>
</div>
</div>
</div>
</body>
</html>
修改后的代码如下：
HTML code:
<!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=gb2312" />
<title>无标题文档</title>
<style>#c:mouseover div:cp{display:block;}
#nvigate li{float:left;line-height:30px;margin-left:4px;width:100px;text-align:center;}
.indexF, .indexP{float:left;width:105px;}
.indexFbg{display:none;height:210px;margin:45px 0 0 0px;position:absolute;width:800px;border:1px #FF0000 solid;}
</style>
<script language="javascript">
function show(id){
document.getElementById(id).style.display='block';
}
function none(id){
document.getElementById(id).style.display='none';
}
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
</script>
</head>
<body>
<div id="box">
<div id="top"><>
<div id="t_1"><>
<img src="img/t_1.jpg" width="1004" height="120" />
</div>
<div id="t_2"><>
</div>
<div id="i_flash"><>
<img src="img/i_flash.jpg" width="1004" height="222" />
</div>
<div id="nvigate"><>
<div onmouseout="none('zcstFbg');MM_swapImgRestore()" onmouseover="show('zcstFbg');MM_swapImage('zcstF','','../img/i/cd1_10.jpg',1)"><>
导航应显示的内容
<div id="zcstFbg" >
原来隐藏的内容
<div>
<img src="img/i_flash.jpg" width="713" height="195" border="0" usemap="#mapsXtjc"/>
<map name="mapsXtjc" id="mapsXtjc">
<area shape="rect" coords="559,46,626,63" href="http://www.zcst.net/Tec_1.html" />
<area shape="rect" coords="559,73,627,90" href="http://www.zcst.net/Tec_2.html" />
<area shape="rect" coords="559,124,625,141" href="http://www.zcst.net/Tec_4.html" />
<area shape="rect" coords="559,98,626,115" href="http://www.zcst.net/Tec_3.html" />
</map>
</div>
</div>
</div>
</div>
<div id="pmd">
<marquee behavior="scroll">跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯跑马灯</marquee>
</div>
</div>
</div>
</body>
</html>