$(document).ready(function(){
    $('#tabbed_blocks').addClass('ready');
    var tabs = $('#tabbed_blocks ul.tabs > li a');
    var blocks = $('#tabbed_blocks ul.blocks > li');
    tabs.each(function(i){
        if (i == 0) {
            $(this).addClass('active');
            blocks.hide();
            $(blocks[i]).show();
        }
        $(this).click(function(e) {
            e.preventDefault();
            tabs.removeClass('active');
            $(this).addClass('active');
            blocks.slideUp();
            $(blocks[i]).slideDown();
        });
    });
});