popup div onmouseover

<script type="text/javascript">

var trigger = document.getElementById("trigger"); // this is the element where the mouse will go over
trigger.onmouseover = function() {toggleOn(e, 'theBullet');}; // call the function toggleOn
trigget.onmouseout = function () { document.getElementById('theBullet').style.display = 'none'}; // hide the bullet div

function toggleOn(e, di)
{
    var theBullet = document.getElementById(di);

    var x = e.pageX ? e.pageX : e.clientX ? e.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft); // get the location on the X axis
    var y = e.pageY ? e.pageY : e.clientY ? e.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop); // get the location on the Y axis

  theBullet.style.position = 'absolute'; 
  theBullet.style.top = y + 'px'; // move into position
  theBullet.style.left = x + 'px';
  theBullet.style.display = 'block'; // make it appear
}
</script>

     
var posx = 0;
    var posy = 0;
    if (!e) var e = window.event;
    if (e.pageX || e.pageY)     {
        posx = e.pageX;
        posy = e.pageY;
    }
    else if (e.clientX || e.clientY)     {
        posx = e.clientX + document.body.scrollLeft
            + document.documentElement.scrollLeft;
        posy = e.clientY + document.body.scrollTop
            + document.documentElement.scrollTop;
    }