function openWindow(url, w, h) {
    var options = "width=" + w + ",height=" + h + ",";
    options += "resizable=no,scrollbars=yes,status=no,";
    options += "menubar=no,toolbar=no,location=no,directories=no";
    var newWin = window.open(url, 'newWin', options);
    newWin.focus();
  }
var win = null;
function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}