function center_win(outer,inner) {

    var e = document.getElementById(inner);
    var f = document.getElementById(outer);
    if (e == null || f == null) return;
    
    var eheight = (f.offsetHeight - e.offsetHeight) / 2;
    var ewidth = (f.offsetWidth - e.offsetWidth) / 2;
    
    if (eheight == 0) {
    
        eheight = f.clientHeight / 2 - e.clientHeight / 2;
        ewidth = f.clientWidth / 2 - e.clientWidth / 2;
        
    }
    
    if (eheight < 0) eheight = 0;
    if (ewidth < 0) ewidth = 0;
    eheight = 200;
    e.style.top = eheight + "px";
    e.style.left = ewidth + "px";
    e.style.marginTop = "0px";
    e.style.marginLeft = "0px";

}