write a clean html

jsont2html.js

var json = {
    "div": {
        "_style": "backgroung-color:#DC0600",
        "_class": "btn btn-default",
        "inner": {
            span: {
                _class: "warning",
                inner: "bacana"
            },
            b: {
                inner: "sim"
            }
        }
    }
};

function json2html(obj) {
    'use strict';
    var x, y, body;
    for (x in obj) {
        if (obj.hasOwnProperty(x)) {
            body = $('<' + x + '></' + x + '>');
            for (y in obj[x]) {
                if (obj[x].hasOwnProperty(y)) {
                    if (y.charAt(0) === '_') {
                        body.attr(y.replace('_', ''), obj[x][y]);
                    }
                    if (obj[x].inner instanceof Object) {
                        body.append(json2html(obj[x].inner));
                    } else {
                        body.html(obj[x].inner);
                    }
                }
            }

        }
    }
    console.log(body);
    return body;
}