var isDOM = (document.getElementById ? true : false); 
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
var isNS = navigator.appName == "Netscape";

var __iTopEdge = 220;

function moveRightEdge() 
{
    var yMenuFrom, yMenuTo, yOffset, timeoutNextCheck;
	var yUserTop = __iTopEdge;

	if ( document.body.scrollTop >= __iTopEdge ) 
		yUserTop = 0;


    if (isNS4) {
        yMenuFrom   = divMenu.top;
        yMenuTo     = windows.pageYOffset + yUserTop; 
    } else if (isDOM) {
        yMenuFrom   = parseInt (divMenu.style.top, 10);
        yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop) + yUserTop;
    }

    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);
}