function openWindow(windowURL,windowName,windowWidth,windowHeight) {
  window.name = 'parentWnd';
  newWindow = window.open(windowURL,windowName,'width='+windowWidth+',height='+windowHeight+',toolbar=0,location=0,directories=0,status=0,menuBar=0,scrollBars=1,resizable=0');
  newWindow.focus();
}