Javascript implementation of a customized LinkedList. I use this as the slides for a custom jQuery carousel that is limited to only 2 list elements.

LinkedList.js

function LinkedList(){};
LinkedList.prototype = {
  length:0,
  first:null,
  last:null,
  cursor:null 
}
LinkedList.DoubleCircular = function(){};
LinkedList.prototype.isEmpty =  function(){
  if(this.length == 0)
    return true;
  return false;
};
LinkedList.DoubleCircular.prototype = new LinkedList();
LinkedList.DoubleCircular.prototype.append = function(node){
  if(this.first === null){
    node.prev = node;
    node.next = node;
    this.first = node;
    this.last = node;
  }else{ 
    node.prev = this.last;
    node.next = this.first;
    this.first.prev = node;
    this.last.next = node;
    this.last = node;
  }
  this.length++;
};
 
LinkedList.DoubleCircular.prototype.insertAfter = function(node,newNode){
 newNode.prev = node;
 newNode.next = node.next;
 node.next.prev = newNode;
 node.next = newNode;
 if(newNode.prev == this.last) { this.last = newNode; }
 this.length++;
};
 
LinkedList.DoubleCircular.prototype.remove = function(node){
 if(this.length > 1 ) {
   node.prev.next = node.next;
   node.next.prev = node.prev;
   if(node == this.first)    this.first = node.next;
   if(node == this.last)     this.last = node.prev;
  }
 else{
   this.first = null;
   this.last = null;
 }
 node.prev = null;
 node.next = null;
 this.length--; 
};
 
LinkedList.DoubleCircular.prototype.reset = function(){ 
  while(this.length > 0)
  {
    this.remove(this.last);
  }
};
 
LinkedList.prototype.setCursor = function(node){
  this.cursor = node;
};
 
 
LinkedList.prototype.getCursor = function(){
  return this.cursor;
};
LinkedList.Node = function(data){
 this.prev = null;
 this.next = null;
 this.data = data;
}