In order to replicate the forward and back button functionality you can use the following Javascript functions :

<script type="text/javascript">

<!--

function goBack() {

  history.go(-1);

}

function goForward() {

  history.go(1);

}

//-->

</script>

These can be used as required or you can create some HTML links :

<a href="javascript:history.go(-1);">Go back</a>

<a href="javascript:history.go(1);">Go Forward</a>

or some HTML buttons :

<form>

<input value="Back" onclick="history.go(-1); return true;" type="button">

<input value="Forward" onclick="history.go(1); return true;" type="button">

</form>