简单头部登陆状态同步 ：review by @杨延青

@@ -6,4 +6,96 @@ if ($('.simple-header').size() > 0) {
     }).on('mouseleave', function() {
         $(this).find('.tool-select').fadeOut();
     });
-}
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+}
+
+/**
+ * 格式化用户名
+ * @return {[type]} [description]
+ */
+function formatUsernName(userName) {
+    var name,
+        char,
+        _num = 0,
+        _length = 0,
+        t;
+
+    for (t = 0; t < userName.length; t++) {
+        char = userName.substr(t, 1);
+        if (/.*[\u4e00-\u9fa5]+.*$/.test(char)) {
+            _length += 2;
+        } else {
+            _length += 1;
+        }
+    }
+    if (_length <= 10) {
+        name = userName;
+    } else {
+        _num = 0;
+        name = '';
+        for (t = 0; t < userName.length; t++) {
+            if (_num < 10) {
+                char = userName.substr(t, 1);
+                if (char !== '*') {
+                    if (/.*[\u4e00-\u9fa5]+.*$/.test(char)) {
+                        _num += 2;
+                    } else {
+                        _num += 1;
+                    }
+                }
+                name += char;
+            }
+        }
+        if (name.length < userName.length) {
+            name += '...';
+        }
+    }
+    return name;
+}
+
+/**
+ * 设置简单头部登陆状态
+ * @return {[type]} [description]
+ */
+function setLoginStatus(_data) {
+    var loginHtml,
+        name;
+
+    if (_data && _data.href &&　_data.href.user) {
+        name = formatUsernName(_data.href.user);
+        loginHtml = '<span>Hi~</span><a href="">' +
+                    name + '</a>&nbsp;<a href="' + _data.href.logout + '">[退出]</a>';
+    } else {
+        name = formatUsernName(_data.user);
+        loginHtml = '<span>Hi~</span><a href="">' +
+                    name + '</a>&nbsp;<a href="http://www.yohobuy.com/signin.html">[请登录]</a>' +
+                    '<a href="http://www.yohobuy.com/reg.html">[免费注册]</a>';
+    }
+    $('.header-tool li').eq(0).html(loginHtml);
+}
+
+/**
+ * 获取登录信息
+ * @return {[type]} [description]
+ */
+function actionLoginInfo() {
+    $.ajax({
+        type: 'GET',
+        url: '/common/getSimpleHeader',
+        data: {},
+        success: function(data) {
+            if (data.code === 200) {
+                setLoginStatus(data.data);
+            }
+        }
+    });
+}
+
+/**
+ * 初始化函数
+ * @return {[type]} [description]
+ */
+function init() {
+    actionLoginInfo(); //获取登录信息
+}
+
+init();
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