Discuz公告效果（自动换行，无间隙滚动）

脚本代码

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML xmlns="http://www.w3.org/1999/xhtml">
<HEAD>
<TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=gbk">
<style type="text/css">
ul {
	padding-right: 0px;
	padding-left: 0px;
	padding-bottom: 0px;
	margin: 0px;
	padding-top: 0px
}
#announcement {
	width:100%;
	background:url(img/menu_bg.gif) repeat;
	overflow: hidden;
}
#announcement div {
	border: #e6e6e6 1px solid;
	padding:0px 10px 0px 10px;
	overflow-y:hidden;
	line-height: 24px;
	height: 24px
}
#announcement li {
	font-size: 12px;
	float: left;
	list-style-type: none;
	margin-right: 20px;
	padding-left: 10px;
	background: url(img/arrow_right.gif) no-repeat 0px 50%;
	white-space: nowrap
}
#announcement a {
	text-decoration: none;
}
#announcement a:hover {
	text-decoration:underline;
}
</style>
</HEAD>
<BODY>
<DIV id=announcement onMouseOver="if(!anncount) {clearTimeout(annst);annst = 0}" onMouseOut="if(!annst) annst = setTimeout('announcementScroll()', anndelay);">
  <DIV id=announcementbody>
    <UL>
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    </UL>
  </DIV>
</DIV>
<script type="text/javascript">
function $(id)
{
   return document.getElementById(id);
}
var anndelay = 3000;
var anncount = 0;
var annheight = 24;
var annst = 0;
function announcementScroll()
{
   if( ! annst)
   {
      $('announcementbody').innerHTML += '<br style="clear: both" />' + $('announcementbody').innerHTML;
      $('announcementbody').scrollTop = 0;
      if($('announcementbody').scrollHeight > annheight * 3)
      {
         annst = setTimeout('announcementScroll()', anndelay);
      }
      else
      {
         $('announcement').onmouseover = $('announcement').onmouseout = null;
      }
      return;
   }
   if(anncount == annheight)
   {
      if($('announcementbody').scrollHeight - annheight <= $('announcementbody').scrollTop)
      {
         $('announcementbody').scrollTop = $('announcementbody').scrollHeight / 2 - annheight;
      }
      anncount = 0;
      annst = setTimeout('announcementScroll()', anndelay);
   }
   else
   {
      $('announcementbody').scrollTop ++ ;
      anncount ++ ;
      annst = setTimeout('announcementScroll()', 10);
   }
}
announcementScroll();
</script>
</BODY>
</HTML>

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