In index.html can not access object in v3d

In index.html, I tried to search an object by its name but pop up an error obj = undefined and position not existed. Is it possible to get the object name by below?
<script>
var scene = new v3d.Scene();
var camera = new v3d.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);

var renderer = new v3d.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var obj = scene.getObjectByName(‘My_HS’);
console.log(‘obj=’,obj);
obj.position.x = 5;
</script>