Merge branch 'gh-pages' of github.com:ruanyf/es6tutorial into gh-pages

docs/promise.md

@@ -45,7 +45,7 @@ Promise实例生成以后，可以用then方法分别指定Resolved状态和Reje
 ```javascript
 promise.then(function(value) {
   // success
-}, function(value) {
+}, function(error) {
   // failure
 });
 ```

js/ditto.js

@@ -18,6 +18,30 @@ var ditto = {
     run: initialize
 };
 
+/**
+ * 获取当前hash
+ *
+ * @param {string} hash 要解析的hash，默认取当前页面的hash，如： nav#类目 => {nav:nav, anchor:类目}
+ * @description 分导航和页面锚点
+ * @return {Object} {nav:导航, anchor:页面锚点}
+ */
+var getHash = function (hash) {
+  hash = hash || window.location.hash.substr(1);
+
+  if (!hash) {
+    return {
+      nav: '',
+      anchor: ''
+    }
+  }
+
+  hash = hash.split('#');
+  return {
+    nav: hash[0],
+    anchor: decodeURIComponent(hash[1] || '')
+  }
+};
+
 var disqusCode = '<h3>留言</h3><div id="disqus_thread"></div>';
 var menu = new Array();
 
@@ -56,16 +80,18 @@ function init_sidebar_section() {
             menu.push(this.href.slice(this.href.indexOf('#')));
         });
         $('#pageup').on('click', function() {
+            var hash = getHash().nav;
             for (var i = 0; i < menu.length; i++) {
-                if (location.hash === '') break;
+                if (hash === '') break;
-                if (menu[i] === location.hash) break;
+                if (menu[i] === '#' + hash) break;
             }
             location.hash = menu[i - 1]
         });
         $('#pagedown').on('click', function() {
+            var hash = getHash().nav;
             for (var i = 0; i < menu.length; i++) {
-                if (location.hash === '') break;
+                if (hash === '') break;
-                if (menu[i] === location.hash) break;
+                if (menu[i] === '#' + hash) break;
             }
             location.hash = menu[i + 1];
         });
@@ -347,14 +373,13 @@ function router() {
         }
       }
     }
-
+    if (location.hash === '' || '#' + getHash().nav === menu[0]) {
-    if (location.hash === '' || location.hash === menu[0]) {
       $('#pageup').css('display', 'none');
     } else {
       $('#pageup').css('display', 'inline-block');
     }
 
-    if (location.hash === menu[(menu.length - 1)]) {
+    if ('#' + getHash().nav === menu[(menu.length - 1)]) {
       $('#pagedown').css('display', 'none');
     } else {
       $('#pagedown').css('display', 'inline-block');