jQuery.timer = function (interval, callback)
 {
    var interval = interval || 100;
 
    if (!callback)
        return false;
    
    _timer = function (interval, callback) {
        this.stop = function () {
            clearInterval(self.id);
        };
        
        this.internalCallback = function () {
            callback(self);
        };
        
        this.reset = function (val) {
            if (self.id)
                clearInterval(self.id);
            
            var val = val || 100;
            this.id = setInterval(this.internalCallback, val);
        };
        
        this.interval = interval;
        this.id = setInterval(this.internalCallback, this.interval);
        
        var self = this;
    };
    
    return new _timer(interval, callback);
 };