How to get the value of option select box in jQuery if I have the code like this,

<select id='media' name='media'>
    <option value='1'>media1</option>
    <option value='2'>media2</option>
    <option value='3'>media3</option>
</select>

When I code for on change event, 

$(document).ready(function()
{
    $("#media").change(function()
    {
        var id=$(this).val();
        var dataString = 'id='+ id;
        alert(id); return false;
    });
});

It gives me media1,media2,media3 instead of 1, 2, 3

How to get the value 1, 2, 3?

jquery html-select
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