<script language="javascript">

function startclock() {
setInterval(clockresizer,1000); // 1000 means a refresh every 1 sec
}

function clockresizer() {
document.getElementById("idpointer").style.width = document.body.clientWidth;
document.getElementById("idpointer").style.height = document.body.clientHeight;
}

function resizer()
 {
document.getElementById("idpointer").style.height = document.body.clientHeight;
document.getElementById("idpointer").style.width = document.body.clientWidth;
 }

</script>