<script>
var createNewElement = function (tag, id, text) {
var result = document.createElement(tag);
result.setAttribute('id',id);
result.innerHTML = text;
return result;
};
var runTests = function () {
document.getElementById("toappended").appendChild(createNewElement("b", "toadd", "should have bold test"));
};
</script>
<body onload="runTests()">
<details open>
<summary id="summary">summary</summary>
<span id="toappended"></span>
</details>
</body>