[DisneyFan25863]

Ok, I've been thinking about how to do this for some time, but can't figure it out. I basically want to have a number stored in a MySQL Database, which can be added or subtracted to from a webpage, then displayed on another. So Basically, the script would be like this. I would put in a query string for each number, (like www.whatever.com/number.php?changenumber=yes, but I already know how to do that). I would then have it so that there would be an option with two buttons (one that says add, one that says subtract), and then a text field for a number. So, for instance, if I wanted to subtract 4 , it would go like this:

I would select the button for "subtract" on the form, then enter "4" in the text field. Clicking submit would go to a php script that would put it in a database. This is where I need help. What should I put for the script?
Something like this?

PHP Code:

<?php

$conn = mysql_connect("localhost", "user", "pass");

mysql_select_db("DB",$conn);

$sql = "INSERT INTO Table values ('', 'What to put here?')";

if (mysql_query($sql, $conn)) {

     echo "record added!";

} else {

    echo "something went wrong";

}

?>

If I were to just use a "$_POST[field]')" there, it would replace the number, right? So does anyone know what I should put?

Thank You!