function writeHeader(pageTitle){
  document.write('<TABLE WIDTH=100%  BGCOLOR="BLUE" CELLSPACING=0 >');

  document.write('<TD align="center" width=120 rowspan=2 BGCOLOR="BLUE"><IMG SRC="/pics/dastec.gif" HEIGHT=50 WIDTH=100 alt="Software Developers Specializing in Data Acquisition and Communications"></TD>');

  document.write('<TD WIDTH=580>');
  document.write('<TABLE WIDTH=100% CELLSPACING=0 >');

  document.write('<TR>');
  document.write('<TD width=580 BGCOLOR="BLUE"><FONT COLOR="white"><CENTER>menu</CENTER></FONT></TD>');
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  document.write('</TABLE>');
  document.write('</TD>');

  document.write('<TD>');
  document.write('</TD>');

  document.write('<TR>');
  document.write('<TD COLSPAN=2 BGCOLOR="BLUE"><B><I><CENTER><FONT SIZE=+2 COLOR="white">');
  document.write(pageTitle);
  document.write('</FONT></CENTER></I></B></TD>');
  document.write('</TR>');

  document.write('</TABLE>');
}