hi..all.for now i'm already connected to database but the result not appear at Tuner range is"+res+"this is my code:

 var str=data[0];
 var matches=str.match(/[EE|EJU].*D/i);

 $.ajax({
            type:"post",
            url:"process1.php",
            data:"tversion="+matches+"&action=tunermatches",
            cache:false,
            async:false,
            success: function(res){
         $('#value').replacewith("<div id='value'><h6>Tuner range is"+res+".</h6></div>");
                                }
                          });
                 });

and this is my process file:

    //connect to database
$dbc=mysql_connect(_SRV,_ACCID,_PWD) or die(_ERROR15.": ".mysql_error());
$db=mysql_select_db("qdbase",$dbc) or die(_ERROR17.": ".mysql_error());

switch(postVar('action')) {
     case 'tunermatches' :
                    tunermatches(postVar('tversion'));
                    break;
    function tunermatches($tversion)){
            $Tuner=mysql_real_escape_string($tversion);
      $sql= "SELECT remark FROM settingdata WHERE itemname='Tuner_range' AND itemdata='".$Tunermatches."'";
      $res=mysql_query($sql) or die (_ERROR26.":".mysql_error());
      $dat=mysql_fetch_array($res,MYSQL_NUM);
            if($dat[0]>0) {
                            echo $dat[0];
                            }
    mysql_close($dbc);
    }