code for adding new elements in javascriipt js
<html>
<head>
<title>t1</title>
<script type="text/javascript">
function addNode()
{var newP = document.createElement("p");
var textNode = document.createTextNode(" This is a new text node");
newP.appendChild(textNode);
document.getElementById("firstP").appendChild(newP); }
</script> </head>
<body> <p id="firstP">firstP<p> </body>
</html>
function create(htmlStr) {
var frag = document.createDocumentFragment(),
temp = document.createElement('div');
temp.innerHTML = htmlStr;
while (temp.firstChild) {
frag.appendChild(temp.firstChild);
}
return frag;
}
var fragment = create('<div>Hello!</div><p>...</p>');
// You can use native DOM methods to insert the fragment:
document.body.insertBefore(fragment, document.body.childNodes[0]);
