function Map(){
    var len = 0;
    var keys = new Array();
    var values = new Array();

    this.get = function(key){
        var val = null;
        for(var i=0; i<len; i++){
            if(keys[i] == key){
                val = values[i];
                break;
            }//end if
        }//end for

        return val;
    }//end get()

    this.put = function(key, value){
        keys[len] = key;
        values[len++] = value;
    }//end put()

    this.length = function(){
        return len;
    }//end length()

    this.contains = function(key){
	var con = false;
        for(var i=0; i<len; i++){
            if(keys[i] == key){
                con = true;
                break;
            }//end if
        }//end for

	return con;
    }//end contains()

    this.remove = function(key){
        var keyArr = new Array();
        var valArr = new Array();
        var l = 0;
        for(var i=0; i<len; i++){
            if(keys[i] != key){
                keyArr[l] = keys[i];
                valArr[l++] = values[i];
            }//end if
        }//end for

        keys = keyArr;
        values = valArr;
	len = l;
    }//end remove()        

}//end Map