text: var hostImg = 'statics/img/host.png';
  var switchImg = 'statics/img/switch.png';
  var portImg = 'statics/img/port.png';
  var intfImg = 'statics/img/intf.png';
  var vethImg = 'statics/img/veth.png';
  var nsImg = 'statics/img/ns.png';
  var bridgeImg = 'statics/img/bridge.png';
  var dockerImg = 'statics/img/docker.png';
  var neutronImg = 'statics/img/openstack.png';
  
  var minusImg = 'statics/img/minus-outline-16.png';
  var plusImg = 'statics/img/plus-16.png';
  var captureIndicatorImg = 'statics/img/media-record.png';
  var pinIndicatorImg = 'statics/img/pin.png';
  
  var nodeImgMap = {
    "host": hostImg,
    "port": portImg,
    "ovsport": portImg,
    "bridge": bridgeImg,
    "switch": switchImg,
    "ovsbridge": switchImg,
    "netns": nsImg,
    "veth": vethImg,
    "bond": portImg,
    "container": dockerImg
  };
  
  var managerImgMap = {
    "docker": dockerImg,
    "neutron": neutronImg
  };
  