// JScript File
  function Hashtable(){
            this.hashtable = new Array();
        }
                        
        Hashtable.prototype.clear = function(){
            this.hashtable = new Array();
        }              
        Hashtable.prototype.containsKey = function(key){
            var exists = false;
            for (var i in this.hashtable) {
                if (i == key && this.hashtable[i] != null) {
                    exists = true;
                    break;
                }       
            }
            return exists;
        }
        Hashtable.prototype.containsValue = function(value){
            var contains = false;
            if (value != null) {
                for (var i in this.hashtable) {
                    if (this.hashtable[i] == value) {
                        contains = true;
                        break;
                    }
                }
            }        
            return contains;
        }
        Hashtable.prototype.get = function(key){
            return this.hashtable[key];
        }
        Hashtable.prototype.isEmpty = function(){
            return (parseInt(this.size()) == 0) ? true : false;
        }
        Hashtable.prototype.keys = function(){
            var keys = new Array();
            for (var i in this.hashtable) {
                if (this.hashtable[i] != null)
                    keys.push(i);
            }
            return keys;
        }
        Hashtable.prototype.put = function(key, value){
            if (key == null || value == null) {
                throw "NullPointerException {" + key + "},{" + value + "}";
            }else{
                this.hashtable[key] = value;
            }
        }
        Hashtable.prototype.remove = function(key){
            var rtn = this.hashtable[key];
            this.hashtable[key] = null;
            return rtn;
        }    
        Hashtable.prototype.size = function(){
            var size = 0;
            for (var i in this.hashtable) {
                if (this.hashtable[i] != null)
                    size ++;
            }
            return size;
        }
        Hashtable.prototype.toString = function(){
            var result = "";
            for (var i in this.hashtable)
            {     
                if (this.hashtable[i] != null)
                    result += "{" + i + "},{" + this.hashtable[i] + "}\n";  
            }
            return result;
        }                                  
        Hashtable.prototype.values = function(){
            var values = new Array();
            for (var i in this.hashtable) {
                if (this.hashtable[i] != null)
                    values.push(this.hashtable[i]);
            }
            return values;
        }                                  
        Hashtable.prototype.entrySet = function(){
            return this.hashtable;
        }