function writeHeaderPage() {    // 
document.write('<table>');
document.write('<tr>');
document.write('<td><img align="left" valign="bottom" src="/immunology/images/page_heading.gif" alt="Department of Immunology Weizmann Institute of Science" topmargin="0" leftmargin="0" marginwidth="0" marginheight="0"></td>');
document.write('</tr>');
document.write('</table>');
document.write('<p>');
}