<!-- this script got from www.javascriptfreecode.com-Coded by: Krishna Eydat -->
<!-- Start of Back/Forward Buttons Script-->
<!-- Presentado por codigos-website.jimdo.com
-->

<center>
<script language="JavaScript" type="text/javascript">
//<![CDATA[
<!-- hide this script tag's contents from old browsers
function goHist(a)
{
history.go(a); // Go back one.
}
//<!-- done hiding from old browsers -->
//]]>
</script>
<form method="post">
<input type="button" value=" Atrás " onclick="goHist(-1)" /> <input type="button" value="Adelante" onclick="goHist(1)" />
</form>
</center>
<!-- End of Back/Forward Buttons Script -->