spot=-1000;// global state memory for position
function move() {
styleObj=document.getElementById('millpop').style;
if (spot < 50) {    // check if at right stop point
    spot+=4;               // no - so move over a bit
    styleObj.top=spot+"px"; // redisplay at new site
    setTimeout('move()',0); // but first wait 50 milliseconds
    }
}