function opendrawingline(){
sub = window.open("./gs/drawingline.xhtm","drawingline","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=420,height=320");
x = (screen.width  - 420) / 2;
y = (screen.height - 320) / 2;
sub.moveTo(x,y);
}