function EventManager() {
    this.events = [];
    this.lastEventID = 0;
}

EventManager.prototype.registerEventID = function( eventID ) {
    var ev = new String(eventID);
    if (!this.events[eventID]) {
        this.events[eventID] = [];
    }
};

EventManager.prototype.registerForEvent = function(eventID, obj, func) {
    var ev = new String(eventID);
    this.events[eventID].push( [obj, func] );
};

EventManager.prototype.deregisterForEvent = function( eventID, obj, func ) {
    var ev = new String(eventID);
    var bResult = false;
    if (!this.events[eventID]) {
        return false;
    }

    for (var i=0;i<this.events[eventID].length;i++) {

        if (this.events[eventID][i][0] == obj &&
            this.events[eventID][i][1] == func) {
            this.events[eventID].splice(i,1);
            bResult = true;
        }
    }
    return bResult;
};

EventManager.prototype.triggerEvent = function( eventID ) {
    var ev = new String(eventID);
    if (!this.events[eventID]) {
        return false;
    }

    var args = new Array();
    for(i=1; i<arguments.length; i++) {
        args[args.length] = arguments[i];
    }

    for (var i=0; i<this.events[eventID].length; i++) {
        this.events[eventID][i][1].apply( this.events[eventID][i][0],
                                          arguments );
    }
    return true;
};