PHP Undefined variable: odbc_close.... Fatal error: Function name must be a string....

The following code:

<table border="1">
<script language="php">
      $ds = odbc_connect("myTest", "", "");
      $shortlist = odbc_do($ds, "
            SELECT *
            FROM shortlist;
      ");
      while(odbc_fetch_row($shortlist)) {
            $lname = odbc_result($shortlist, 1);
            $fname = odbc_result($shortlist, 2);
            $email = odbc_result($shortlist, 3);
            print("
                  <tr>
                  <td>$fname</td>
                  <td>$lname</td>
                  <td>$email</td>
                  </tr>
            ");}
      $odbc_close($ds);
</script>
</table>

Gives me the following errors:
          Notice: Undefined variable: odbc_close in c:\webroot\myTest\index.php on line 26
          Fatal error: Function name must be a string in c:\webroot\myTest\index.php on line 26

If I omit odbc_close (comment it out), the code executes just fine.  But it doesn't solve the problem of the fact that the function is not performing the way I think it's supposed to.  Perhaps this is an installation issue?  I just installed PHP and am using on this machine for the first time - Windows XP Pro.


Thanks in advance!
Regards,
Carlos