function showServices() {
    button = document.getElementById("serviceMenu");
    menu = document.getElementById("serviceDiv");
    menu.style.display = "block";
    var offset =findPos( button );
    menu.style.position ="absolute";
    menu.style.left = offset[0];
    menu.style.top = offset[1] + 20;
}
  
function hideServices() {
    menu = document.getElementById("serviceDiv");
    menu.style.display = "none";
}

function findPos(obj) {
    var curtop = 0;
    var curleft = 0;
    
    do {
        curleft += obj.offsetLeft || 0;
        curtop += obj.offsetTop || 0;
        obj = obj.offsetParent;
    } while (obj);

    return [curleft,curtop];
}