marquee （垂直）循环滚动的js实现
<script type="text/javascript" language="javascript">
/*My Marquee SCRIPT Start*/
var m_m_p_delay = 40;/*每30ms移动1次*/
var m_m_p_step = 1;/*每次移动1px*/
var m_m_p_pN = 1;/*每次移动1px*/
var m_m_d_id = 'my_marquee_main';/*外容器*/
var m_m_d1_id = 'my_marquee_div1';/*容器1*/
var m_m_d2_id = 'my_marquee_div2';/*容器2*/
var m_m_i_id = 'my_marquee_info';/*位置信息*/
document.getElementById(m_m_d2_id).innerHTML=document.getElementById(m_m_d1_id).innerHTML;
function set_my_marquee_parame(){
if(document.getElementById(m_m_d2_id).offsetHeight-document.getElementById(m_m_d_id).scrollTop <= m_m_p_pN){
document.getElementById(m_m_d_id).scrollTop-=document.getElementById(m_m_d1_id).offsetHeight;
}
else{
document.getElementById(m_m_d_id).scrollTop++;
}
document.getElementById(m_m_i_id).innerHTML='';
document.getElementById(m_m_i_id).innerHTML+='div.scrollTop:'+document.getElementById(m_m_d_id).scrollTop;
}
var my_marquee_interval=setInterval(set_my_marquee_parame,m_m_p_delay);
document.getElementById(m_m_d_id).onmouseover=function() {clearInterval(my_marquee_interval);};
document.getElementById(m_m_d_id).onmouseout=function() {my_marquee_interval=setInterval(set_my_marquee_parame,m_m_p_delay);};
/*My Marquee SCRIPT End*/
</script>
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