function getOffset( el ) {
               
            
    var _x = 0;
    var _y = 0;
    while( el && !isNaN( el.offsetLeft ) && !isNaN( el.offsetTop ) ) {
        _x += el.offsetLeft - el.scrollLeft;
        _y += el.offsetTop - el.scrollTop;
        el = el.offsetParent;
    }
    return { top: _y, left: _x };
}

function displayElementAt(element, atElement) {
    element.style.left=getOffset(atElement).left+"px";
    element.style.top=getOffset(atElement).top+"px";
    element.style.display="block";
    element.style.zIndex=0;
}