// open a new Window:
function newWin(url,windowname,window_apperance,bReturnWindowHandle) {
  if (url == null) url = '';
  if (windowname == null) windowname = '_blank';
  if (window_apperance == null || window_apperance == '') window_apperance = 'left=10,top=10,scrollbars=yes,menubar=no,resizable=yes,toolbar=no,location=no';
  newwindow = open(url,windowname,window_apperance);
  newwindow = newwindow.focus();
  if (bReturnWindowHandle) return newwindow;
}