I am writing a jQuery plugin and am running into a few problems with regard to variables. For example I have the following skeleton structure for my plugin, which is going to act on a textbox. In my init function I want to set a variable and bind a keypress event to my textbox. That keypress event needs to call another function, in which I need the variable. Is this possible?

(function($){
    var methods = {
        init : function(options){
            return this.each(function(){
                var $this = $(this);
                var someVar = 'somevar';
                $this.keypress(function(event){
                    //I want to call my customFunction
                });
            });
        },
        customFunction : function(){
            //I am wanting to access 'someVar' here
        };
    $.fn.mynamespace = function(method){
        //handle which method to call here
    };
})(jQuery);

Many thanks in advance.