no = Math.floor(Math.random() * 21);
document.write('<TABLE border="0" cellpadding="0" cellspacing="0">\n');
document.write('  <TBODY>\n');
document.write('    <TR>\n');
document.write('      <TD><IMG src="../../img/sub' + no +'.jpg" width="770" height="111" border="0"></TD>\n');
document.write('    </TR>\n');
document.write('  </TBODY>\n');
document.write('</TABLE>\n');