N = (document.all) ? 0 : 1;
var ob;
var over = false;


function MD(e) {
if (over)
{
if (N) {
ob = document.getElementById("pop1");
X=e.layerX;
Y=e.layerY;
return false;
}
else {
ob = document.getElementById("pop1");
ob = ob.style;
X=event.offsetX;
Y=event.offsetY;
}
}
}

function MM(e) {
if (ob) {
if (N) {
ob.style.top = e.pageY-Y;
ob.style.left = e.pageX-X;
}
else {
ob.pixelLeft = event.clientX-X + document.body.scrollLeft;
ob.pixelTop = event.clientY-Y + document.body.scrollTop;
return false;
      }
   }
}

function MU() {
ob = null;
}
if (N) {
document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
}

document.onmousedown = MD;
document.onmousemove = MM;
document.onmouseup = MU;