//外层div超出隐藏，内层div用js控制宽度，使里面的内容能浮左不换行
//延迟时间，li宽度，外层div宽度，内层div宽度，ul1的id，ul2的id*/
function scrollfun(fn,yanchi,liwidth,divwidth,divw,divn,ul1name,ul2name)
{    
    this.speed=yanchi//速度数值越大速度越慢
    var ulid2=document.getelementbyid(ul2name);
    var ulid1=document.getelementbyid(ul1name);
    var scrolldiv=document.getelementbyid(divw);
    var divnei=document.getelementbyid(divn);
    var islong=false;
    var iscopy=true;
    scrolldiv.scrollleft=0;
    this.getst=function ()
    {
        divnei.style.width=ulid1.getelementsbytagname("li").length*liwidth*2+"px";
    }
    this.getst();
    if((ulid1.getelementsbytagname("li").length*liwidth)<divwidth)
        return;
    else
        islong=true;
    if(islong&&iscopy)
    {
        ulid2.innerhtml=ulid1.innerhtml;
        iscopy=false;
    }
    function marquee()
    {
        var sleft=parseint(ulid1.getelementsbytagname("li").length*liwidth)*2-divwidth;
        if(mtype==0)
        {
            if(scrolldiv.scrollleft>=sleft)
            {
                scrolldiv.scrollleft-=(ulid1.getelementsbytagname("li").length*liwidth);
            }
            else
            {
                scrolldiv.scrollleft++
            }
        }
        else
        {
            if(scrolldiv.scrollleft==0)
            {
                scrolldiv.scrollleft=(ulid1.getelementsbytagname("li").length*liwidth);
            }
            else
            {
                scrolldiv.scrollleft--
            }
        }
    }
    fn=setinterval(marquee,this.speed)
    this.stop=function(){clearinterval(fn);}
    this.start=function(){fn=setinterval(marquee,yanchi)}
    divnei.onmouseover=this.stop;
    divnei.onmouseout=this.start;
}

function scrollfundu(fn,tdsj,yanchi,liheight,divheight,divw,divn,ul1name,ul2name)
{   
    this.speed=yanchi//速度数值越大速度越慢
    var ulid2=document.getelementbyid(ul2name);
    var ulid1=document.getelementbyid(ul1name);
    var scrolldiv=document.getelementbyid(divw);
    var divnei=document.getelementbyid(divn);
    var islong=false;
    var iscopy=true;
    var nh=0;
    scrolldiv.scrolltop=0;
    this.getst=function ()
    {
        nh=ulid1.getelementsbytagname("li").length;
        
        divnei.style.height=nh*liheight*2+"px";
    }
    this.getst();
    
    var td=0;
    function marquee()
    {
        if(nh<3)
            return;
        else
            islong=true;
        if(islong&&iscopy)
        {
            ulid2.innerhtml=ulid1.innerhtml;
            iscopy=false;
        }
        
        td++;
        var stop=nh*liheight*2-divheight;
        if(scrolldiv.scrolltop>=stop)
        {
            var py=(nh*liheight);
            scrolldiv.scrolltop-=py;
            scrolldiv.scrolltop++;
        }
        else
        {
            scrolldiv.scrolltop++;
        }
        if(td==(liheight))
        {
            clearinterval(fn);
            fn=settimeout(function(){fn=setinterval(marquee,this.speed)},tdsj);
            td=0;
            return ;
        }
        
    }
    fn=setinterval(marquee,this.speed)
    this.stop=function(){clearinterval(fn); cleartimeout(fn);}
    this.start=function(){fn=setinterval(marquee,yanchi)}
    divnei.onmouseover=this.stop;
    divnei.onmouseout=this.start;
}