Jquery插件无法正常工作

I am very new to jQuery. I am trying to use a plugin called Searchable Dropdown, that I got from here: http://jsearchdropdown.sourceforge.net/ . but I cannot figure out how to make it work.. What am I doing wrong?

<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" ></script>
<script src="scripts/jquery.searchabledropdown-1.0.8.min.js" type="text/javascript"></script>
<script>

    $(document).ready(function() {
        $("select").searchable();
    });
</script>

</head>

<?php
echo "<form method='post' action='' id='employeesselection'>
  <select    name='select_employee' id='select_employee'>";
       while($row=mysql_fetch_array($employees)){
            $selected = ($row['Id'] == $_POST['select_employee'])?'selected="selected"':'';
    echo '<option '.$selected.' value="'.$row['Id'].'">'.$row['Etunimi'].' - '. $row['Sukunimi'].'</option>';

}
   echo "</select></form>";

The select is working fine but searching in the select as the jQuery should enable, is not working.

Try also to give your code some semantic:

<?php 

// DATABASE CONNECTION
// DATABASE QUERY

 ?>
<html lang="en">
<head>

<!-- CSS -->

</head>

<body>
    <form action="" method="post" id="employeesselection">
        <select name="select_employee" id="select_employee">
            <?php while ( $row = mysql_fetch_array( $employees ) ) {
                $selected = ( $row['id'] == $_POST['select_employee'] ) ? ' selected ' : '';
            ?>      
                <option <?php echo $selected ?> value="<?php echo $row['id'] ?>">
                    <?php echo $row['etunimi'] ?> - <?php echo $row['sukunimi'] ?>
                </option>
            <?php } ?>
        </select>
    </form>

<!-- All Javascript down here -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" ></script>
<script src="scripts/jquery.searchabledropdown-1.0.8.min.js" type="text/javascript"></script>

<script>
    $(document).ready(function() {
            $("select").searchable();
    });
</script>
</body>
</html>

Maybe the error isn't in your javascript but in php...

Good luck debugging!

I belive its to do with Jquery 1.9.1.

Replace

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" ></script>

With

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>