Code:
$(document).ready(function(){

var myObj = function() { };

myObj.prototype = {
        
        init: function(options){
            
                var defaults ={
                speed:1000,
                increment: 1
            };
        
            this.state ={
                started: false,
                timer: 0,
                interval: 0,
                counter: 0
            };

            this.options = $.extend({}, defaults, options);
        },

        clock: function(){
            this.state.timer+=1;
                },
        start : function(){
            this.state.interval = setInterval(this.clock, this.options.speed);
        },
        stop : function(){
            clearInterval(this.state.interval);
        }
};

o = new myObj();
o.init({speed:2000});
o.start();
});