diff --git a/public/js/common.js b/public/js/common.js
index 19455f3d3..9f81a97d8 100644
--- a/public/js/common.js
+++ b/public/js/common.js
@@ -8,7 +8,7 @@ var DROPBOX_APP_KEY = config.DROPBOX_APP_KEY;
 
 //common
 var port = window.location.port;
-var serverurl = window.location.protocol + '//' + (domain ? domain : window.location.hostname) + (port ? ':' + port : '') + (urlpath ? '/' + urlpath : '');
+window.serverurl = window.location.protocol + '//' + (domain ? domain : window.location.hostname) + (port ? ':' + port : '') + (urlpath ? '/' + urlpath : '');
 var noteid = urlpath ? window.location.pathname.slice(urlpath.length + 1, window.location.pathname.length).split('/')[1] : window.location.pathname.split('/')[1];
 var noteurl = serverurl + '/' + noteid;
 
diff --git a/public/js/cover.js b/public/js/cover.js
index 245127d15..3dd4de091 100644
--- a/public/js/cover.js
+++ b/public/js/cover.js
@@ -1,7 +1,6 @@
 var common = require('./common');
 var checkIfAuth = common.checkIfAuth;
 var urlpath = common.urlpath;
-var serverurl = common.serverurl;
 var resetCheckAuth = common.resetCheckAuth;
 var getLoginState = common.getLoginState;
 var clearLoginState = common.clearLoginState;
diff --git a/public/js/extra.js b/public/js/extra.js
index d853bf935..7cae068e3 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -544,7 +544,6 @@ function exportToRawHTML(view) {
 }
 
 var common = require('./common.js');
-var serverurl = common.serverurl;
 //extract markdown body to html and compile to template
 function exportToHTML(view) {
     var title = renderTitle(ui.area.markdown);
diff --git a/public/js/history.js b/public/js/history.js
index 8593bbcff..d924eec18 100644
--- a/public/js/history.js
+++ b/public/js/history.js
@@ -3,7 +3,6 @@ var store = require('store');
 var common = require('./common');
 var checkIfAuth = common.checkIfAuth;
 var urlpath = common.urlpath;
-var serverurl = common.serverurl;
 var getLoginState = common.getLoginState;
 
 var extra = require('./extra');
diff --git a/public/js/index.js b/public/js/index.js
index de0ba0ba8..5246f9490 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -21,7 +21,6 @@ var urlpath = common.urlpath;
 var noteid = common.noteid;
 var debug = common.debug;
 var version = common.version;
-var serverurl = common.serverurl;
 var GOOGLE_API_KEY = common.GOOGLE_API_KEY;
 var GOOGLE_CLIENT_ID = common.GOOGLE_CLIENT_ID;
 var DROPBOX_APP_KEY = common.DROPBOX_APP_KEY;
diff --git a/public/js/slide.js b/public/js/slide.js
index d90fd436b..2536c6028 100644
--- a/public/js/slide.js
+++ b/public/js/slide.js
@@ -14,7 +14,6 @@ var urlpath = commonModule.urlpath;
 var noteid = commonModule.noteid;
 var debug = commonModule.debug;
 var version = commonModule.version;
-var serverurl = commonModule.serverurl;
 var GOOGLE_API_KEY = commonModule.GOOGLE_API_KEY;
 var GOOGLE_CLIENT_ID = commonModule.GOOGLE_CLIENT_ID;
 var DROPBOX_APP_KEY = commonModule.DROPBOX_APP_KEY;