function writeHeader() {    // 
document.write('<table width="100%" border="0" cellspacing="0" cellpadding="0">');
document.write('<tr valign="top">');
document.write('<td align="left" >');
document.write('<br>');
document.write('<br>');
document.write('<td valign="middle"  align="left"> ');
document.write('<img  src="images/main-title-left-small.jpg" alt="The Ron Naaman Group" border="0">');
document.write('</td>');
document.write('<td align="left" >');
document.write('<br>');
document.write('<br>');
document.write('<a href="http://www.weizmann.ac.il"><img border="0" align="center" src="images/semel.jpg"   ALT="Weizmann Logo"></a></td>');
document.write('</tr>');
document.write('</table>');
}