How can I simplify all the functions below, as they all the same but for one bit, and I have got a load more to do too.

Code:
<script>
Shadowbox.init({
    skipSetup: true
});
$('.btn').click(function() {
    var content = $('#sbdiv').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn2').click(function() {
    var content = $('#sbdiv2').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn3').click(function() {
    var content = $('#sbdiv3').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn4').click(function() {
    var content = $('#sbdiv4').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn5').click(function() {
    var content = $('#sbdiv5').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn6').click(function() {
    var content = $('#sbdiv6').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn7').click(function() {
    var content = $('#sbdiv7').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
$('.btn8').click(function() {
    var content = $('#sbdiv8').html();
    Shadowbox.open({
        content: content,
        player: 'html',
        /*title: "Hi",*/
        displayNav: false,
        height: 600,
        width: 700
    });
});
</script>