Check if value exists in table on db

[Kaikko]

Hi,

I want to make a query and check if data is exists already on my
is_availble table on calendar db to disappear checkbox.
I have 16 checkboxs and each time only one can be selected, and I want it disapperas
after it has been selected once.

Hope you can help me with this 🙂

I have this code for first checkbox.

<?php
mysql_select_db("calendar", $con);

echo"<div  class='box'><div class='boxbut'>";

$query = mysql_query("SELECT * FROM is_availble WHERE datetime = .$datetime.");
if($_POST['datetime'] != ($row['day1']."&nbsp;&nbsp;&nbsp;".$row['time1']))  {
echo"
<input type='radio' name='datetime' value='". $row['day1']."&nbsp;&nbsp;&nbsp;".$row['time1']."'>
<d>". $row['day1'] ,"</d><br/><t>". $row['time1'] ."</t></div></div>";
}

else{
echo "    ";
}

Regards