function login_btn(logo, guid)
{
  document.write("<div id='Asperion'>");
  document.write("<a href='https://app1.asperion.nl/?rid=" + guid + "'>");
  
  switch (logo)
  {
    case '1': { document.write("<img border='0' width='187' height='63' src='http://www.asperion.nl/ism/inlogbutton-small.gif'  alt='Asperion Online Boekhouden' title='Asperion Online Boekhouden' />"); break }
    case '2': { document.write("<img border='0' width='187' height='82' src='http://www.asperion.nl/ism/inlogbutton-medium.gif' alt='Asperion Online Boekhouden' title='Asperion Online Boekhouden' />"); break }
    case '3': { document.write("<img border='0' width='187' height='148' src='http://www.asperion.nl/ism/inlogbutton-large.gif'  alt='Asperion Online Boekhouden' title='Asperion Online Boekhouden' />"); break }
    case '4': { document.write("<span style='padding:4px; border:solid 1px gray; font-size:11px; color:#000000; font-style:normal; cursor:hand; font-family:Arial; font-weight:600'>Login - Online Boekhouden</span>"); break }
    // And so on.. and so on..
    default: { document.write("<img border='0' width='187' height='148' src='http://www.asperion.nl/ism/inlogbutton-large.gif' alt='Asperion Online Boekhouden' title='Asperion Online Boekhouden' />"); break }
  }
  document.write("</a>");
  document.write("</div>");
}