text: 
  var ar = new AugmentedRealityViewer(function(here, callback) {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", "js/data.json", true);
      xhr.onload = function() { 
  	try {
  	    var data = JSON.parse(xhr.responseText);
  	    callback(data);
  	} catch (e) {
  	    console.log(e);
  	}	
      };
      xhr.send();
  });
  ar.setViewer(document.getElementById('camera'));