var speed_head_roll=5;
var speed_head_roll_stop=1800;
var headRollObj=document.getElementById("head_roll");
var realHeadRollHeight=360;
head_roll_02.innerHTML=head_roll_01.innerHTML;
function headRoll(){
clearInterval(MyMarTop);
var t_s=headRollObj.scrollTop;
if(t_s>=realHeadRollHeight) t_s=0;
t_s++;
headRollObj.scrollTop=t_s;
var isStop=t_s%120;
if(isStop==0)
MyMarTop=setInterval(headRoll,speed_head_roll_stop);
else
MyMarTop=setInterval(headRoll,speed_head_roll);
}
var MyMarTop=setInterval(headRoll,speed_head_roll_stop);
head_roll.onmouseover=function() {
clearInterval(MyMarTop)
}
head_roll.onmouseout=function() {
MyMarTop=setInterval(headRoll,speed_head_roll)
}