mysql_fetch_array funkce

Muze mi nekdo skontrolovat kde mam chybu :

tohle je chybova hlaska :
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in c:\program files\easyphp1-8\www\shop\kosik.php on line 107


<?php
while($row = mysql_fetch_array($result)) to je line 107

{
// zjistí celkovou cenu
$totalcena += ($row["pocet"] * $row["cena"]);
?>
<tr>
<td width="15%">
<select name="<?php echo $row["id"]; ?>" onChange="updatepocet(this)">
<?php

for ($i = 1; $i <= 20; $i++)
{
echo "<option ";
if ($row["pocet"] == $i) {
echo " selected ";
} else {
echo ">" . $i . "</option>";
}
}
?>

</select>
</td>
<td width="55%">
<?php echo $row["jmeno"]; ?>
</td>
<td width="20%">
<?php echo $row["cena"]; ?> K&egrave;
</td>
<td width="10%">
<a href="kosik.php?action=remove&id=<?php echo $row["id"]; ?>">Odstranit</a>
</td>
</tr>
<?php
}