var _scroll_topmargin=250;        // À̵¿ ¸Þ´ºÀÇ »ó´Ü ÇÑ°è Çȼ¿
       var _scroll_ing_topmargin=0;         // ¿òÁ÷ÀÌ´Â µµÁßÀÇ »ó´Ü°úÀÇ °£°Ý
       var _scroll_activate_speed=0;        // Ãʱ⠿òÁ÷ÀÓÀ» °¨ÁöÇÏ´Â ½Ã°£Â÷ÀÌ (1/1000ÃÊ)
       var _scroll_ing_activate_speed=0;        // ¿òÁ÷À̱⠽ÃÀÛÇÑ ÀÌÈÄ¿¡ °¨ÁöÇÏ´Â ½Ã°£Â÷ÀÌ (1/1000ÃÊ)

       var isDOM = (document.getElementById ? true : false); 
       var isIE4 = ((document.all && !isDOM) ? true : false);
       var isNS4 = (document.layers ? true : false);

       function getRef(id) {
               if (isDOM) return document.getElementById(id);
               if (isIE4) return document.all[id];
               if (isNS4) return document.layers[id];
       }

       var isNS = navigator.appName == "Netscape";

       function moveRightEdge() {
               var yMenuFrom, yMenuTo, yOffset, timeoutNextCheck;
               if (isNS4) {
                       yMenuFrom   = divMenu.top;
                       yMenuTo     = windows.pageYOffset+_scroll_ing_topmargin;
               } else if (isDOM) {
                       yMenuFrom   = parseInt (divMenu.style.top, 10);
                       yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop)+_scroll_ing_topmargin;
               }
               if(yMenuTo<_scroll_topmargin) yMenuTo = _scroll_topmargin;

               timeoutNextCheck = _scroll_activate_speed;

               if (yMenuFrom != yMenuTo) {
                       yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / 10);
                       if (yMenuTo < yMenuFrom) yOffset = -yOffset;
                       if (isNS4) divMenu.top += yOffset;
                       else if (isDOM) divMenu.style.top = parseInt (divMenu.style.top, 10) + yOffset;
                       timeoutNextCheck = _scroll_ing_activate_speed;
               }
               setTimeout ("moveRightEdge()", timeoutNextCheck);
       }