marguee 上下滚动

   <!-- 滚动显示最新公告 -->

   <td class="navmid2">

<div id=marqueeBox style="overflow:hidden;height:23px" onMouseOver="clearInterval(marqueeInterval[0])" onMouseOut="marqueeInterval[0]=setInterval('startMarquee()',2000)"><div></div></div>

<script>

var marqueeBox=document.getElementById("marqueeBox");

function sendURL(id){

window.showModalDialog("post/"+id+".html",window,"dialogWidth:520 px; dialogHeight:480 px; directories:no; localtion:no; menubar:no; status=no; toolbar=no; scrollbars:no;Resizeable=no");

}

var marqueeContent=new Array();//滚动公告

<logic:iterate id="b" name="bulletinList"  indexId="i">

marqueeContent[${i}]='<span class="post"><a bulletin.do?dispatch=userview&ID=${b.ID} target="rightFrame">${b.title}</a></span><br>';

</logic:iterate>

if(marqueeContent.length==0){

marqueeContent[0]='<span class="post">暂无公告</span><br>';

}

var marqueeInterval=new Array();

var marqueeId=0;

var marqueeDelay=2500;

var marqueeHeight=23;

function initMarquee() {

var str=marqueeContent[0];

marqueeId++;

marqueeInterval[0]=setInterval("startMarquee()",marqueeDelay);

}

function startMarquee() {

var str="";

if(marqueeContent[marqueeId]!= null){

str = marqueeContent[marqueeId];

}

marqueeId++;

if(marqueeId>=marqueeContent.length) marqueeId=0;

if(marqueeBox.childNodes.length==1) {

var nextLine=document.createElement('DIV');

nextLine.innerHTML=str;

marqueeBox.appendChild(nextLine);

} else {

marqueeBox.childNodes[0].innerHTML=str;

marqueeBox.appendChild(marqueeBox.childNodes[0]);

marqueeBox.scrollTop=0;

}

clearInterval(marqueeInterval[1]);

marqueeInterval[1]=setInterval("scrollMarquee()",23);

}

function scrollMarquee() {

marqueeBox.scrollTop++;

if(marqueeBox.scrollTop%marqueeHeight==(marqueeHeight-1)){

clearInterval(marqueeInterval[1]);

}

}

initMarquee();

</script>

</td>