Quick mock

Count slider

function Counter(length) {
  this.length = (typeof length == 'undefined') ? 5 : length;
	this.iterator = (typeof this.iterator == 'undefined') ? 0 : this.iterator;
	
	this.next = function() {
		return ( this.iterator > this.length) ? this.iterator = 0 : this.iterator++;
	}

	this.slide = function() {
		console.log("IT: "+ this.iterator );
		_next = this.next( this.iterator );
		console.log("count2: "+ this.iterator  );
		
		return this.iterator;
	}
	
	this.count = function() { 	
	};
}

var a = new Counter(5);
setInterval( function() { return a.slide() }, 1000 );

var b = new Counter(5);
setInterval( function() { return b.slide() }, 1000 );