// IF AGENTS ARE AVAILABLE:
    function agents_available()
    {
      document.getElementById('smartbutton').innerHTML =
        '<a href="#" title="Click to chat to one of our BUPA agents" onClick="window.open(\'/heartbeat/html/instantservice_static_prechat_invite.html\',' +
        '\'custclient\',\'width=500,height=370,scrollbars=1\');return false;">' +
        '<img src="/promotions/B402/images/instantservice/available.gif" height="69" width="217"/></a>' +
		'<p class="smallprint webchat">Web Chat available:<br/> Mon-Fri 9am-8pm,<br/> Saturday 9am-1pm</p>';
      return true;
    }
    // IF AGENTS ARE NOT AVAILABLE:
    function agents_not_available()
    {
      document.getElementById('smartbutton').innerHTML =
        '<img src="/promotions/B402/images/instantservice/not_available.jpg" width="155" height="102" class="no_webchat" />';
      return true;
    }