pubsub.js

/*
    jQuery publish/subscribe by Mark Meyer
        - http://markdotmeyer.blogspot.com/2008/09/jquery-publish-subscribe.html
    jQuery unsubscribe by Zach Holmquist
*/
jQuery.subscribe = function( eventName, obj, method ){
    $(window).bind( eventName, function() {
        obj[method].apply( obj, Array.prototype.slice.call( arguments, 1 ) );
    });
    return jQuery;
}

jQuery.publish = function(eventName){
    $( window ).trigger( eventName, Array.prototype.slice.call( arguments, 1 ) );
    return jQuery;
}

jQuery.unsubscribe = function( eventName ){
    $(window).unbind( eventName );
    return jQuery;
}