Hi try the below code,
<input type="button" value="Add" onclick="add()" />
<div id="divEl"></div>
function add() {
var element = document.createElement("input");
element.setAttribute("type", "button");
element.setAttribute("value", "text");
element.setAttribute("name", "radio");
var divEl= document.getElementById("divEl");
divEl.appendChild(element);
}
Hopes this will help for you......