eventify.js

// Eventify adds bind/trigger event functionality to any class! yay!
window.Eventify = function(c) {
    c.prototype.bind = function(eventName, func) {
        if(!this.event_bindings)
            this.event_bindings = {}
        if(!this.event_bindings[eventName])
            this.event_bindings[eventName] = []
        this.event_bindings[eventName].push(func)
    }
    c.prototype.trigger = function(eventName) {
        if(!this.event_bindings) return;
        if(!this.event_bindings[eventName]) return;

        for(var i = 0; i < this.event_bindings[eventName].length; i++) {
            this.event_bindings[eventName][i].apply(this, Array.prototype.slice.call(arguments, 1))
        }
    }
    c.prototype.unbind = function(eventName, func) {
        if(!this.event_bindings) return;
        if(!this.event_bindings[eventName]) return;

        if(!func) {
            delete this.event_bindings[eventName]
            return
        }

        for(var i = this.event_bindings[eventName].length - 1; i >= 0; i-- ) {
            if(this.event_bindings[eventName][i] == func)
                this.event_bindings[eventName].splice(i, 1)
        }
    }
}