function NewWindow(url,name,w,h,scroll)
{
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  var props = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
  var win = window.open(url,name,props);
  if (parseInt(navigator.appVersion) >= 4) { 
    win.window.focus(); 
  }
}