var slidemenu_X = 170; 
var slidemenu_Y = 70; 



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


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

function getSty(id) {
    x = getRef(id);
    return (isNS4 ? getRef(id) : getRef(id).style);
}

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

    if (isNS4) {
        yMenuFrom   = divMenu.top;
        yMenuTo     = windows.pageYOffset + slidemenu_X;   
    } else if (isDOM) {
        yMenuFrom   = parseInt (divMenu.style.top, 10);
        yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop) + slidemenu_X; 
    }
    timeoutNextCheck = 30;
    
    divMenu_H = document.getElementById('divMenu');
    limit_H = (parseInt(document.body.scrollHeight)-slidemenu_Y)-parseInt(divMenu_H.offsetHeight);
    divMenu_t = parseInt(divMenu.style.top) ;
    if (yMenuFrom != yMenuTo) {
        yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / 20);
        if (yMenuTo < yMenuFrom){
            yOffset = -yOffset;
        }
        if (isNS4){
            if(yOffset > 0){
                if ( divMenu_t < limit_H) {
                    divMenu.top += yOffset;
                }
            }else{
                divMenu.top += yOffset;
            }
            
        }else if (isDOM){
            if(yOffset > 0){
                if ( divMenu_t < limit_H) {
                    divMenu.style.top = parseInt (divMenu.style.top) + yOffset;
                }
            }else{
                divMenu.style.top = parseInt (divMenu.style.top) + yOffset;
            }
        }
        timeoutNextCheck = 10;
    }

    setTimeout ("moveRightEdge()", timeoutNextCheck);
}


if (isNS4) {    
    var divMenu = document["divMenu"];
    divMenu.top = slidemenu_X;
    divMenu.visibility = "visible";
    moveRightEdge();
} else if (isDOM) {
    var divMenu = getRef('divMenu');    
    divMenu.style.top = slidemenu_X;    
    divMenu.style.visibility = "visible";    
    moveRightEdge();
}