// first we call the 'ready' function
$(function() {

    // so when the page loads we can call the replacement:
    $('a.youtube_290x176').youtubin({
        swfWidth : '290',
        swfHeight : '176'
    });

    // so when the page loads we can call the replacement:
    $('a.youtube_400x243').youtubin({
        swfWidth : '400',
        swfHeight : '243'
    });

    // so when the page loads we can call the replacement:
    $('a.youtube_560x340').youtubin({
        swfWidth : '560',
        swfHeight : '340'
    });

    // so when the page loads we can call the replacement:
    $('a.youtube_640x385').youtubin({
        swfWidth : '640',
        swfHeight : '385'
    });

    // so when the page loads we can call the replacement:
    $('a.youtube_853x505').youtubin({
        swfWidth : '853',
        swfHeight : '505'
    });

    // so when the page loads we can call the replacement:
    $('a.youtube_1280x745').youtubin({
        swfWidth : '1280',
        swfHeight : '745'
    });

});