一个比较实用的导航菜单
<style type="text/css"><!--
.titleStyle{
background-color:#FFCC99;color:#006699;border-top:1px solid #FFFFFF;font-size:9pt;cursor:hand;
}
.contentStyle{
background-color:#eeffee;color:blue;font-size:9pt;
}
-->
</style>
<script language="JavaScript">
<!--
var layerTop=267; //菜单顶边距
var layerLeft=840; //菜单左边距
var layerWidth=150; //菜单总宽
var titleHeight=30; //标题栏高度
var contentHeight=300; //内容区高度
var stepNo=10; //移动步数，数值越大移动越慢
var itemNo=0;runtimes=0;
document.write('<span id=itemsLayer style="position:absolute;overflow:hidden;border:1px solid #008800;left:'+layerLeft+';top:'+layerTop+';width:'+layerWidth+';">');
function addItem(itemTitle,itemContent){
itemHTML='<div id=item'+itemNo+' itemIndex='+itemNo+' style="position:relative;left:0;top:'+(-contentHeight*itemNo)+';width:'+layerWidth+';"><table width=100% cellspacing="0" cellpadding="0">'+
'<tr><td height='+titleHeight+' onclick=changeItem('+itemNo+') class="titleStyle" align=center>'+itemTitle+'</td></tr>'+
'<tr><td height='+contentHeight+' class="contentStyle">'+itemContent+'</td></tr></table></div>';
document.write(itemHTML);
itemNo++;
}
//添加菜单标题和内容，可任意多项，注意格式：
addItem('贝买网','
欢迎光临贝买网！');
addItem('测试','<center><a href="#">测试</a>
<a href=".#">测试</a>
<a href="#">返回首页</a></center>');
addItem('测试','<center><a href=".#">测试</a>
<a href=".#">测试</a>
<a href=".#">测试</a>
<a href=".#">测试</a>
<a href="#">返回首页</a></center>');
document.write('</span>')
document.all.itemsLayer.style.height=itemNo*titleHeight+contentHeight;
toItemIndex=itemNo-1;onItemIndex=itemNo-1;
function changeItem(clickItemIndex){
toItemIndex=clickItemIndex;
if(toItemIndex-onItemIndex>0) moveUp(); else moveDown();
runtimes++;
if(runtimes>=stepNo){
onItemIndex=toItemIndex;
runtimes=0;}
else
setTimeout("changeItem(toItemIndex)",10);
}
function moveUp(){
for(i=onItemIndex+1;i<=toItemIndex;i++)
eval('document.all.item'+i+'.style.top=parseInt(document.all.item'+i+'.style.top)-contentHeight/stepNo;');
}
function moveDown(){
for(i=onItemIndex;i>toItemIndex;i--)
eval('document.all.item'+i+'.style.top=parseInt(document.all.item'+i+'.style.top)+contentHeight/stepNo;');
}
changeItem(0);
//-->
</script>
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