<form method="post">
<input type="button"value="للخلف" onClick="gotoHist(-1)">
<input type="button" value="للامام" onClick="gotoHist(1)">
</form>
<input type="button"value="للخلف" onClick="gotoHist(-1)">
<input type="button" value="للامام" onClick="gotoHist(1)">
</form>