if ($_POST['jobtype'] == $value_of_option_in_the_database) { 
$selected = "selected"; 
} else {
$selected = "";
}
?>
<select name='jobtype' style='width: 350px'>
<option value='$line[4]' <?php echo $selected; ?>>$line[4]</option>
<option value='Employee' <?php echo $selected; ?>>Employee</option>
........