http://techjunk.websewak.com/change-href-target-text-of-an-anchor-tag-using-javascript/

Code (javascript)

<html>
<head>
<script type=“text/javascript”>
function changeLink()
{

        document.getElementById(‘myLink’).innerHTML=“WebSewak”;
        document.getElementById(‘myLink’).href=“http://www.websewak.com”;

        document.getElementById(‘myLink’).target=“_blank”;
}

</script>
</head>
<body>

<a id=“myLink” href=“http://www.yah.in”>Yah.in Collection</a>

<input type=“button” onclick=“changeLink()” value=“Change link”>

</body>
</html>