var popup, xOffset, yOffset;
//detect browser
var ns=document.getElementById&&!document.all;
var ie=document.all;

document.onmousemove=get_mouse;
xOffset=5, yOffset=10;

function get_mouse(e) {
     popup=document.getElementById("notesPopup");
     var x=(ns)?(e.pageX):(event.x+document.body.scrollLeft);
     popup.style.left=x+xOffset;
     var y=(ns)?(e.pageY):(event.y+document.body.scrollTop);
     popup.style.top=y+yOffset;
}

//these function will display/hide the popup when the song name is moused over
function showPopup(msg) {
     popup.innerHTML=msg;
     popup.style.display="block";
}
function hidePopup() {
     popup.style.display="none";
}