Úprava funkce ve scriptu (nevím jak načíst tabulku)

$(document).ready(function() {
    $('#wait_1').hide();
    $('#drop_1').change(function(){
      $('#wait_1').show();
      $('#result_1').hide();
      $.get("func.php", {
        func: "drop_1",
        drop_var: $('#drop_1').val()
      }, function(response){
        $('#result_1').fadeOut();
        setTimeout("finishAjax('result_1', '"+escape(response)+"')", 400);
      });
        return false;
    });
});

function finishAjax(id, response) {
  $('#wait_1').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax_tier_three(id, response) {
  $('#wait_2').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}

<form action="" method="post">
  
    <select name="drop_1" id="drop_1">
    
      <option value="" selected="selected" disabled="disabled">Vyber interpreta</option>
      
      <?php getTierOne(); ?>
    
    </select> 
    
    <span id="wait_1" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_1" style="display: none;"></span>
    <span id="wait_2" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_2" style="display: none;"></span> 
  
</form>

<?php 
ini_set('display_errors',1); 
 error_reporting(E_ALL);
//**************************************
//     Page load dropdown results     //
//**************************************
function getTierOne()
{
   $dbname = 'country';

$sql = "show tables from  $dbname where tables_in_$dbname in ('domaci','zahranicni','others')  ";
$result = mysql_query($sql);

if (!$result) {
    echo "DB Error, could not list tables\n";
    echo 'MySQL Error: ' . mysql_error();
    exit;
}

while ($tier = mysql_fetch_row($result)) {
    echo '<option value="'.$tier[0].'">'.$tier[0].'</option>';
}

}

//**************************************
//     First selection results     //
//**************************************
if($_GET['func'] == "drop_1" && isset($_GET['func'])) { 
   drop_1($_GET['drop_var']); 
   
}

function drop_1($drop_var)
{  

    include_once('settings.php');
    
    $result = mysql_query("SELECT DISTINCT `Contentgroup` FROM $drop_var ORDER BY Contentgroup ASC") 
    or die(mysql_error());
    echo '<select name="drop_2" id="drop_2">
          <option value=" " disabled="disabled" selected="selected">Interpret</option>';

           while($drop_2 = mysql_fetch_array( $result )) 
            {
              echo '<option value="'.$drop_2['Contentgroup'].'">'.$drop_2['Contentgroup'].'</option>';
            }
    
    echo '</select>';
    echo "<script type=\"text/javascript\"> 
$('#wait_2').hide();
    $('#drop_2').change(function(){
      $('#wait_2').show();
      $('#result_2').hide();
      $.get(\"func.php\", {
        func: \"drop_2\",
        drop_var: $('#drop_2').val()
      }, function(response){
        $('#result_2').fadeOut();
        setTimeout(\"finishAjax_tier_three('result_2, result_1', '\"+escape(response)+\"')\", 400);
      });
        return false;
    });
</script>";

 }

//**************************************
//     Second selection results     //
//**************************************
if($_GET['func'] == "drop_2" && isset($_GET['func'])) { 
   drop_2($_GET['drop_var']);
   
}
function drop_2($drop_var)
{     
    include_once('settings.php');

    $result = mysql_query("SELECT Title FROM $tabulka_z_databaze WHERE Contentgroup='".mysql_real_escape_string($drop_var)."' ") 
    or die(mysql_error());

    echo '<select name="drop_3" id="drop_3">
          <option value=" " disabled="disabled" selected="selected">Odkaz</option>';

           while($drop_3 = mysql_fetch_array( $result )) 
            {
              echo '<option value="'.$drop_3['Title'].'">'.$drop_3['Title'].'</option>';
            }
    
    echo '</select> '; echo   $_GET['drop_var'];
    echo '<input type="submit" name="submit" value="Submit" />';
} 

?>