// JScript 文件
var _speed=20;
var _str_way="up";

var dpud=document.getElementById("div_pd_und");
var dpud1=document.getElementById("div_pd_und1");
var dpud2=document.getElementById("div_pd_und2");

dpud2.innerHTML=dpud1.innerHTML;
function sc_upndown()
{
    if(_str_way=="up")
    {
        if(dpud2.offsetTop-dpud.scrollTop<=0)
        {
            dpud.scrollTop-=dpud1.offsetHeight;
        }
        else
        {
            dpud.scrollTop++;
        }
    }
    else
    {
        if(dpud1.offsetTop-dpud.scrollTop>=0)
        {
            dpud.scrollTop+=dpud2.offsetHeight;
        }
        else
        {
            dpud.scrollTop--;
        }
    }
}

function _changeway(str_way_)
{
    _str_way=str_way_;
    clearInterval(itv_active);
    itv_active=setInterval(sc_upndown,speed);
}
function _changespeed(i_sp)
{
    _speed=i_sp;
    clearInterval(itv_active);
    itv_active=setInterval(sc_upndown,_speed);
}
var itv_active=setInterval(sc_upndown,_speed);
dpud.onmouseover=function() {clearInterval(itv_active);}
dpud.onmouseout=function() {itv_active=setInterval(sc_upndown,_speed);}