var stickydiv = document.getElementById('stickyad');
var stickydivcontainer = document.getElementById('stickyadcontainer');
window.onscroll = function () {
if (stickydivcontainer.getBoundingClientRect().top<5) {
stickydiv.style.position ='fixed';
stickydiv.style.top = '5px';
} else {
stickydiv.style.position ='relative';
stickydiv.style.top = '0px';
}
}