VBDAPI

<html>
<head>
<script type="text/javascript" src="http://www.vietbando.com/maps/API/VBDMapAPI.js?key=e7vjH+pgQHuSyV75dwG6hq0WQek+cVqm"></script>
<script type="text/javascript">
function MyControl()
{
  this.initialize = initialize;
  this.getDefaultPosition = getDefaultPosition;
  this.vType = vType;

  function initialize(map)
  {
      this.id = 'MyControl';
      var divcontainer = document.createElement("div");
      divcontainer.id = 'MyControl';
      divcontainer.style.position = 'absolute';
      divcontainer.style.border = "1px solid black";
      var divZoomIn = document.createElement("div");
      divZoomIn.style.cursor = 'pointer';
      divcontainer.appendChild(divZoomIn);
      divZoomIn.appendChild(document.createTextNode("Phóng to"));
      VEvent.addDOMListener(divZoomIn, "click", function() { map.zoomIn(); });

      var divZoomOut = document.createElement("div");
      divZoomOut.style.cursor = 'pointer';
      divcontainer.appendChild(divZoomOut);
      divZoomOut.appendChild(document.createTextNode("Thu nhỏ"));
      VEvent.addDOMListener(divZoomOut, "click", function() { map.zoomOut(); });
      map.getContainer().appendChild(divcontainer);
  }

  function getDefaultPosition()
  {
      var defaultpos = new VControlPosition(V_ANCHOR_TOP_LEFT, new VSize(0, 0));
      return defaultpos;
  }

  function vType()
  {
      return 'MyControl';
  }
}

MyControl.prototype = new VControl();

function loadMap()
{
  if (VBrowserIsCompatible())
  {
     var map = new VMap(document.getElementById('container'));
     map.setCenter(new VLatLng(10.8152328, 106.680505), 4);
     map.addControl(new VScaleControl());
     map.addControl(new MyControl());
  }
}
</script>
</head>
<body onload="loadMap()">
<div id="container" style="height:500px; position:relative; margin:10px; border:1px #b1c4d5 solid;"></div>
</body>
</html>