js实现公告文字标题无缝向上滚动特效

2016-12-20 网页编程网 网页编程网

<HTML>
<HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<TITLE>无间隙文字向上滚动特效</TITLE>
<style type="text/css">
ul {
 padding-right: 0px;
 padding-left: 0px;
 padding-bottom: 0px;
 margin: 0px;
 padding-top: 0px
}
#net {
 width:100%;
 background:url(img/menu_bg.gif) repeat;
 overflow: hidden;
}
#net div {
 border: #e6e6e6 1px solid;
 padding:0px 10px 0px 10px;
 overflow-y:hidden;
 line-height: 24px;
 height: 24px
}
#net li {
 font-size: 12px;
 float: left;
 list-style-type: none;
 margin-right: 20px;
 padding-left: 10px;
 background: url() no-repeat 0px 50%;
 white-space: nowrap
}
#net a {
 text-decoration: none;
}
#net a:hover {
 text-decoration:underline;
}
</style>
</HEAD>
<BODY>
<DIV id=net onMouseOver="if(!anncount) {clearTimeout(annst);annst = 0}" onMouseOut="if(!annst) annst = setTimeout('mainDo()', anndelay);">
  <DIV id=w_net>
    <UL>
      <LI><A href="http://#/" target="_blank">滚动新闻1号</A>（2008-12-16 05:30 P.M.）</LI>
      <LI><A href="http://www.#" target="_blank">滚动公告1号</A>（2008-12-13 03:39 P.M.）</LI>
      <LI><A href="http://#" target="_blank">阿噢，不停的滚动</A>（2008-12-13 03:23 P.M.）</LI>
      <LI><A href="http://www.#" target="_blank">阿噢，不停的滚动，欢迎来到。</A>（2008-12-13 03:12 P.M.）</LI>
      <LI><A href="http://#" target="_blank">专注于网页特效及广告代码</A>（2008-11-29 07:38 P.M.）</LI>
      <LI><A href="http://www.#" target="_blank">噢买噶</A>（2008-11-27 07:45 P.M.）</LI>
      <LI><A href="http://#" target="_blank">滚动阿滚动</A>（2008-11-23 03:00 P.M.）</LI>
      <LI><A href="http://www.#" target="_blank">啊啊啊啊啊啊啊</A>（2008-11-22 04:54 P.M.）</LI>
      <LI><A href="http://#" target="_blank">哦哦哦哦哦哦哦哦哦哦哦哦哦哦哦</A>（2008-11-20 05:19 P.M.）</LI>
    </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 mainDo(){
   if(!annst){
      $('w_net').innerHTML += '<br style="clear: both" />' + $('w_net').innerHTML;
      $('w_net').scrollTop = 0;
      if($('w_net').scrollHeight > annheight * 3){
         annst = setTimeout('mainDo()', anndelay);
      }else{
         $('net').onmouseover = $('net').onmouseout = null;
      }
      return;
   }
   if(anncount == annheight){
      if($('w_net').scrollHeight - annheight <= $('w_net').scrollTop){
         $('w_net').scrollTop = $('w_net').scrollHeight / 2 - annheight;
      }
      anncount = 0;
      annst = setTimeout('mainDo()', anndelay);
   }else{
      $('w_net').scrollTop ++ ;
      anncount ++ ;
      annst = setTimeout('mainDo()', 10);
   }
}
mainDo();
</script>
</BODY>
</HTML>

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