var date = new Date(); var sec = date.getSeconds(); var imgNo = "";
     if (sec<=12)	{ imgNo = "1"; }
else if (sec<=24)	{ imgNo = "2"; }
else if (sec<=36)	{ imgNo = "3"; }
else if (sec<=48)	{ imgNo = "4"; }
else 		{ imgNo = "5"; }

document.write('<!-- MASTEHEAD GRAPHIC --><table width="100%" border="0" cellpadding="0" cellspacing="0" bgcolor="#66ff00"><tr>');
document.write('<td width="100%" background="images/header/header_bg.jpg" align="left"><img src="images/header/header' + imgNo + '.jpg" width="400" height="100" border="0"></td>');
document.write('<td width="372"><img src="images/header/header_logo.jpg" width="372" height="100" border="0"></td>');
document.write('<!-- END MASTEHEAD GRAPHIC --></tr></table>');