Disable browser back button functionality using JavaScript in asp.net

<script type="text/javascript" language="javascript">

function DisableBackButton() {

window.history.forward()

}

DisableBackButton();

window.onload = DisableBackButton;

window.onpageshow = function(evt) { if (evt.persisted) DisableBackButton() }

window.onunload = function() { void (0) }

</script>