Answer 1

Actually i think you have to use CSS to control the position of your pop up.

popup {
border-color: #000;
border-style: groove;
border-width: 2px;
padding: 0px;
background-color: #FFF;
font-size: 70%;
position: absolute;
top: 200px; <--- The popup appears 200px from the top of the page
}

Using top: 200px; will make sure the popup appears 200px from the top of the page you can use other things like "bottom:...etc.