var scroll_pixel,div_pixel,gtpos,gbpos,loop,moving_spd;
var top_margin = 540;         /// âÀÇ ¸ÇÀ§¿ÍÀÇ ¿©¹é ³»·Á¿Ã¶§
var top_margin2 = 560;      /// âÀÇ ¸ÇÀ§¿ÍÀÇ ¿©¹é ¿Ã¶ó¿Ã¶§ 
var speed = 20;            /// Á¡Â÷ ÁÙ¾îµå´Â ¼Óµµ¸¦ À§ÇÑ ¼³Á¤           
var speed2 = 15;           /// setTimeoutÀ» À§ÇÑ ¼Óµµ ¼³Á¤
var moving_stat = 1;      /// ¸Þ´ºÀÇ ½ºÅ©·ÑÀ» ·Îµù½Ã on/off¼³Á¤ 1=¿òÁ÷ÀÓ 0Àº ¸ØÃã 

function check_scrollmove()
{
  scroll_pixel = document.body.scrollTop;
        gtpos = document.body.scrollTop+top_margin;
        gbpos = document.body.scrollTop+top_margin2;
  if(div_id.style.pixelTop < gtpos)
        { 
         moving_spd = (gbpos-div_id.style.pixelTop)/speed;
         div_id.style.pixelTop += moving_spd;    
        }
        if(div_id.style.pixelTop > gtpos)
        {
         moving_spd = (div_id.style.pixelTop-gtpos)/speed;
         div_id.style.pixelTop -= moving_spd;
        }
        loop = setTimeout("check_scrollmove()",speed2);
}
function moving_control()
{
  if(!moving_stat){ check_scrollmove(); moving_stat = 1;}
        else{ clearTimeout(loop); moving_stat = 0; div_id.style.pixelTop = top_margin;}
}
check_scrollmove();