Hello

I have the following html code and Javascript code.
It's a page when I press on a button a function ' loadDatos' will be called
And it opens my local json file (on my harddisk). The json file is converted from a obj file that was a cube made in blender
If I show it I see the code in a alertbox
But I would like to see the cube in my webbrowser.

Which function do I need ?

Code:
<!DOCTYPE html>
<html>
<head>


<script>

function loadDatos() {   
    var xobj = new XMLHttpRequest();
    xobj.overrideMimeType("application/json");
    xobj.open('GET', 'part1.json', true);
    xobj.onreadystatechange = function () 
	{
        if (xobj.readyState == 4) 
		{
			alert('test');
            var jsonTexto = xobj.responseText;
			alert(jsonTexto);
            //ProcessTheData(jsonTexto);
        }
    }
    xobj.send(null);
}
</script>
</head>
<body>
<body>

<h1>My First JavaScript</h1>
<p id="demo">This is a paragraph.</p>

<button type="button" onclick="loadDatos()">Display Date</button>

</body>
</body>
</html>
Thanks!