function openPopWindow(file,l,t,w,h) {
  myPopWindow=0;
  if (myPopWindow.open) { 
  	myPopWindow.focus();
	}
  else {
  myPopWindow=window.open(file,"newWindow",'left=' + l + ',top=' + t + ',width=' + w + ', height=' + h + ',menubar=no,resizable=yes,scrollbars=no,toolbar=no,status=no');
  window.myPopWindow.focus();
  }
}