Can anyone help me to figure out the error in my code? i want to display data through two input search..my code goes like these.

```
<table>
    <tr>
        <td>Studid</td>
        <td>Course</td>
    </tr>

 <?php
    include ("connect.php");

    if(isset($_POST['submit']))

    {
    $studno=$_POST['idsearch'];
    $scourse=$_POST['coursesearch'];
    $sql=mysql_query("SELECT * FROM cfnr WHERE studid= ".$studno." AND course=".$scourse."");

    }

    ?>

    <?php
    while($row=mysql_fetch_array($sql))

    {

 }  

?> 
  <tr>
        <td><?php echo $row['studid'];?></td>
        <td><?php echo $row['course'];?></td>
    </tr>

</table>

```

i got this error in my screen.

**"mysql\_fetch\_array() expects parameter 1 to be resource, boolean given in "**

thanks! :)