Postin problem

When i tring to post from web to table it posting empty info, and when i refreshing page where i inserted <form> system to post info it again posting for no reson empty info in database, any ideas how to fix it? :confused:

function chat()
{

$prisijungimas = mysql_connect("localhost","root","") or die("Neprisijungei!");
mysql_select_db("vadimo") or die("Nerasta duomenu baze!");
$query = "SELECT Vardas, Texstas FROM anonimchat";
$result = mysql_query($query);

while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
echo "
<table bordercolor='#00CC00' border='none'>
<tr>
<td height='12'>
<a><br>Name:</a>
</td>
<td>
<b>{$row['Vardas']}</b> <br>" .

" </td>
</tr>
<tr>
<td><a>Comment:</a>
</td>
<td>
<b> {$row['Texstas']}</b>
</td>
</tr>
</table>
<br><hr size='1'>
";
}

echo '
<form action="index.php?ms=ch" method="post">
<table bordercolor="#860000" border="none">
<tr>
<td height="32">
<a>Name:</a>
</td>
<td>
<input type="name" name="Vardas" />
</td>
</tr>
<tr>
<td>
<a>Comment:</a>
</td>
<td>
<textarea name="Texstas" value="Texstas" cols="56" rows="10"></textarea><br>
</td>
</tr>
<tr>
<td>
<input type="submit" value="Comment" name="P" />
</td>
</tr>
</table>

</form>
';
$P = mysql_connect ("localhost","root","") or die("Nepavyko prisijunkti prie Mysql!");

mysql_select_db ("vadimo");

$idejimasilentele="INSERT INTO anonimchat (Vardas, Texstas) VALUES ('$_POST[Vardas]','$_POST[Texstas]')";


if (!mysql_query($idejimasilentele, $P))
{
die('Error: ' . mysql_error());
}
echo "Commented!";
mysql_close($P);

}