function openabout() {
  var supportemail='service@groepen.nl';
  var t='';
  t+='<table cellspacing="0" cellpadding="0" border="0">'+
     '<tr>'+
       '<td class="td_marge">'+
         '<table width="100%" cellspacing="2" cellpadding="0" border="0">'+
         '<col width="680">'+
         '<tr>'+
           '<td class="td_rand" valign="top">'+
             '<table width="100%" cellspacing="0" cellpadding="0" border="0">'+
             '<col width="74"><col width="14"><col>'+
             '<tr class="tr_boxtitel"><td colspan="3"><b>&nbsp;About:</b></td></tr>'+
             '<tr><td>&nbsp;naam</td><td>&nbsp;</td><td><b>MijnAccommodatie</b></td></tr>'+
             '<tr><td>&nbsp;versie</td><td>&nbsp;</td><td>2.1</td></tr>'+
             '<tr><td>&nbsp;copyright</td><td>&nbsp;</td><td>'+copyrightstring()+'</td></tr>'+
//             '<tr><td>&nbsp;i.o.v.</td><td>&nbsp;</td><td><a href="http://www.groepsaccommodaties.nl" target="_blank">'+BusinessName+'</a></td></tr>'+
             '<tr><td colspan="3">&nbsp;</td></tr>'+
             '<tr><td>&nbsp;support</td><td><input type="image" src="'+common_path+'img/SendEmail.gif" tabindex="-1" title="email naar: '+supportemail+'" onclick="emailto(\''+supportemail+'\')"></td><td>'+supportemail+'</td></tr>'+
//             '<tr><td colspan="3">&nbsp;</td></tr>'+
//             '<tr><td style="vertical-align:top;">&nbsp;support</td><td>&nbsp;</td><td>Support WareMasters tijdelijk bereikbaar via telnr: 024 8452419 ipv 024 3881777. Dit laatste nummer is zsm weer actief!</td></tr>'+
             '<tr><td colspan="3">&nbsp;</td></tr>'+
             '<tr>'+
               '<td colspan="2">&nbsp;</td>'+
               '<td>'+
                 '<table cellspacing="0" cellpadding="0" border="0">'+
                 '<tr>'+
                   '<td class="td_klik_lokaal" onclick="javascript:maakinhoud()">&nbsp;terug naar menu&nbsp;</td>'+
                 '</tr>'+
                 '</table>'+
               '</td>'+
             '</tr>'+
             '</table>'+
           '</td>'+
         '</tr>'+
         '</table>'+
       '</td>'+
     '</tr>'+
     '</table>';
  t+=maaksendemailform();
  getid('inhoudspan').innerHTML=t;
}