Jquery/script.js at master · steph-sce/Jquery · GitHub

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$(function () {

  var $mainMenuItems = $("#main-menu ul").children("li"),
    totalMainMenuItems = $mainMenuItems.length,
    openedIndex = 2,

    init = function () {
      bindEvents();
      if (validIndex(openedIndex))
        animateItem($mainMenuItems.eq(openedIndex), true, 700);
    },

    bindEvents = function () {

      $mainMenuItems.children(".images").click(function () {
        var newIndex = $(this).parent().index();
        checkAndAnimateItem(newIndex);
      });

      $(".button").hover(
        function () {
          $(this).addClass("hovered");
        },
        function () {
          $(this).removeClass("hovered");
        }
      );

      $(".button").click(function () {
        var newIndex = $(this).index();
        checkAndAnimateItem(newIndex);
      });
    },

    validIndex = function (indexToCheck) {
      return (indexToCheck >= 0) && (indexToCheck < totalMainMenuItems);
    },

    animateItem = function ($item, toOpen, speed) {
      var $colorImage = $item.find(".color"),
        itemParam = toOpen ? { width: "420px" } : { width: "140px" },
        colorImageParam = toOpen ? { left: "0px" } : { left: "140px" };
      $colorImage.animate(colorImageParam, speed);
      $item.animate(itemParam, speed);
    },

    checkAndAnimateItem = function (indexToCheckAndAnimate) {
      if (openedIndex === indexToCheckAndAnimate) {
        animateItem($mainMenuItems.eq(indexToCheckAndAnimate), false, 250);
        openedIndex = -1;
      }
      else {
        if (validIndex(indexToCheckAndAnimate)) {
          animateItem($mainMenuItems.eq(openedIndex), false, 250);
          openedIndex = indexToCheckAndAnimate;
          animateItem($mainMenuItems.eq(openedIndex), true, 250);
        }
      }
    };

  init();

});