A Madlib creator using object generation

    function Madlib_item(type, index) {
        // members
        this.index = index;
        this.text = "";
        this.value = "";
        //initialization
        if (type=="noun") {
            this.text = "Please type a noun";
        } else if (type=="adjective") {
            this.text = "Please type an adjective";
        }
        //methods
        this.input = function() {
            return this.text + ': <input type="text" id="choice' + this.index + '" />/<br/>';
        }
    }

    function Madlib_form(items, action) {
        // members
        this.items = items;
        this.items_count = items.length;
        this.html = '';
        //initialization
        this.html = '<form action="' + action + '" method="post">';
        //methods
        this.present = function() {
            return_str = this.html;
            for (i=0; i<this.items_count; i++) {
                return_str += items[i].input();
            }
            return_str += "</form>";
            return return_str;
        }
    }
    
    function Madlib_story(text, choices, substitution_string) {
        // members
        this.story = "";
        this.substitution_string = substitution_string;
        this.choices_count = choices.length;
        //initialization
        this.story = text;
        //methods
        this.getStory = function() {
            var text = this.story;
            for (i=0; i<this.choices_count; i++) {
                text = text.replace(this.substitution_string, document.getElementById("choice" + i).value);
            }
            return text;
        }
        this.getChoices = function() {
            return_str="";
            for (i=0; i<this.choices_count; i++) {
                return_str += document.getElementById("choice" + i);
                return_str += ", ";
            }
            return return_str;
        }
    }