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 + 139; //½ÃÀÛ Y Æ÷ÀÎÆ® 
        } else if (isDOM) { 
                yMenuFrom   = parseInt (divMenu.style.top, 10); 
                yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop) + 139; //½ÃÀÛ Y Æ÷ÀÎÆ® 
        } 
        timeoutNextCheck = 500;  

        if (yMenuFrom != yMenuTo) { 
                yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / 5); 
                if (yMenuTo < yMenuFrom) 
                        yOffset = -yOffset; 
                if (isNS4) 
                        divMenu.top += yOffset; 
                else if (isDOM) 
                        divMenu.style.top = parseInt (divMenu.style.top, 10) + yOffset; 
                        timeoutNextCheck = 10; 
        } 
        setTimeout ("moveRightEdge()", timeoutNextCheck); 
}