Estara mal, o yo lo hago mal?

Código:

<html>
<title>Prueba</title>
<style type="text/css">
a:link{color: #ffffff; text-decoration: none;}
a:visited{color: #ffffcc; text-decoration: underline;}
a:active{color: #ffffff; text-decoration: underline;}
a:hover{color: #ffffff; text-decoration: underline;}
body{font-family: Verdana; font-size: 8pt; background: #336699; color: #FFFFFF;}
td,p{font-family: Verdana; font-size: 8pt;}
textarea,select,input{background:#004284; color: #ffffff; FONT-FAMILY: Verdana; FONT-SIZE: 10px; BORDER-BOTTOM: 1px #ffcc00 solid; BORDER-LEFT: 1px #ffcc00 solid; BORDER-RIGHT: 1px #ffcc00 solid; border-top: 1px #ffcc00 solid;}
.border{background: #ffcc00;}
.main{background: #004284;}
.child{background: #80a3c5;}
</style>
<BODY BGCOLOR="FFFFFF">

<SCRIPT LANGUAGE="JavaScript">

var phone_num='';
var timerID = null;
var timerRunning = false;
function but1()
{

phone_num = phone_num + '1';
chknum();
}
function but2()
{
phone_num = phone_num + '2';
chknum();
}
function but3()
{
phone_num = phone_num + '3';
chknum();
}
function but4()
{
phone_num = phone_num + '4';
chknum();
}
function but5()
{
phone_num = phone_num + '5';
chknum();
}
function but6()
{
phone_num = phone_num + '6';
chknum();
}
function but7()
{
phone_num = phone_num + '7';
chknum();
}
function but8()
{
phone_num = phone_num + '8';
chknum();
}
function but9()
{
phone_num = phone_num + '9';
chknum();
}
function but0()
{
phone_num = phone_num + '0';
chknum();
}
function chknum()
{
if (phone_num=="100")
parent.frames.main.location="http://www.microsoft.com/";
if (phone_num=="200")
parent.frames.main.location="http://www.google.com";
if (phone_num=="300")
parent.frames.main.location="http://www.vanhackez.com";
if (phone_num=="400")
parent.frames.main.location="http://www.islatortuga.com/";
if (phone_num=="500")
parent.frames.main.location="http://www.linux.com";
if (phone_num=="392")
top.document.location="http://www.izhal.com/v1/sol/r4nqup.php";
if (phone_num=="600")
parent.frames.main.location="http://www.php.net";
if (phone_num=="700")
parent.frames.main.location="http://www.softonic.com/";
if (phone_num=="800")
parent.frames.main.location="http://www.izhal.com/";
if (phone_num=="900")
parent.frames.main.location="http://www.izhal.com/guerra.shtml";

document.board.pn.value=phone_num;
}
function clearit()
{
phone_num = "";
document.board.pn.value=phone_num;
}

</SCRIPT>
<center>

<p> </p>
<p> </p>
<p><u><b>Consola<br>

<br>
<br>
</b></u></p>
<FORM name="board">
<p>
<input type=button value=" 1 "onClick=but1()>
<input type=button value=" 2 "onClick=but2()>
<input type=button value=" 3 "onClick=but3()>
<br>

<br>
<input type=button value=" 4 "onClick=but4()>
<input type=button value=" 5 "onClick=but5()>
<input type=button value=" 6 "onClick=but6()>
<br>
<br>
<input type=button value=" 7 "onClick=but7()>
<input type=button value=" 8 "onClick=but8()>
<input type=button value=" 9 "onClick=but9()>

<br>
<br>
<input type=button value=" 0 "onClick=but0()>
<br>
<br>
<input type=text name=pn>
<br>
<br>
<input type=button value="Borrar"onClick=clearit()>

</p>
<p> </p>
<p><br>
</p>
<b><u>Códigos de Acceso</u></b> <br>
<br>
100 - Microsoft<br>

200 - Google<br>
300 - VanHackez<br>
400 - Isla Tortuga<br>
500 - Linux<br>
600 - PHP<br>
700 - Softonic<br>

800 - Comunidad iZhal<br>
900 - Pantalla azul<br>
??? - Ascenso<br>
</form></center>

Aki antes iba la pass, pero ya no xD, lo modifiké.

Bueno pos ale

Saludos