function build_ingredient_row() {
    var ingredient_row_outer_div = document.createElement("div");
    ingredient_row_outer_div.setAttribute("class", "row");

    var ingredient_row_amount_div = document.createElement("div");
    ingredient_row_amount_div.setAttribute("class", "col s2 m1");
    var ingredient_amount_input = document.createElement("input");
    ingredient_amount_input.setAttribute("class", "center-align");
    ingredient_amount_input.setAttribute("type", "text");
    ingredient_amount_input.setAttribute("name", "amount[]");
    ingredient_row_amount_div.appendChild(ingredient_amount_input);

    var ingredient_row_measure_div = document.createElement("div");
    ingredient_row_measure_div.setAttribute("class", "col s2 m1");
    var ingredient_measure_input = document.createElement("input");
    ingredient_measure_input.setAttribute("class", "center-align");
    ingredient_measure_input.setAttribute("type", "text");
    ingredient_measure_input.setAttribute("name", "measure[]");
    ingredient_row_measure_div.appendChild(ingredient_measure_input);

    var ingredient_row_ingredient_div = document.createElement("div");
    ingredient_row_ingredient_div.setAttribute("class", "col s8 m10");
    var ingredient_ingredient_input = document.createElement("input");
    ingredient_ingredient_input.setAttribute("type", "text");
    ingredient_ingredient_input.setAttribute("name", "ingredient[]");
    ingredient_row_ingredient_div.appendChild(ingredient_ingredient_input);

    ingredient_row_outer_div.appendChild(ingredient_row_amount_div);
    ingredient_row_outer_div.appendChild(ingredient_row_measure_div);
    ingredient_row_outer_div.appendChild(ingredient_row_ingredient_div);

    return ingredient_row_outer_div;
}


function add_more_ingredients() {
    var ingredients_node = document.getElementById("input_fields_for_ingredients");
    var ingredients_button_node = document.getElementById("add_ingredients_button");
    ingredients_node.insertBefore(build_ingredient_row(), ingredients_button_node);
    ingredients_node.insertBefore(build_ingredient_row(), ingredients_button_node);
    ingredients_node.insertBefore(build_ingredient_row(), ingredients_button_node);
}


function build_preparation_input() {
    var preparation_input = document.createElement("input");
    preparation_input.setAttribute("type", "text");
    preparation_input.setAttribute("name", "preparation[]");
    return preparation_input;
}


function add_more_preparation() {
    var preparations_node = document.getElementById("input_fields_for_preparation");
    var preparations_button_node = document.getElementById("add_preparation_button");
    preparations_node.insertBefore(build_preparation_input(), preparations_button_node);
    preparations_node.insertBefore(build_preparation_input(), preparations_button_node);
    preparations_node.insertBefore(build_preparation_input(), preparations_button_node);
}