diff --git a/content/hints.js b/content/hints.js
index 034cf83a..93f2d9f7 100644
--- a/content/hints.js
+++ b/content/hints.js
@@ -496,15 +496,15 @@ vimperator.Hints = function() //{{{
                 x = Number(coords[0]);
                 y = Number(coords[1]);
             }
-            doc = window.content.document;
-            view = window.document.defaultView;
+            var doc = window.content.document;
+            var view = window.document.defaultView;
 
             var evt = doc.createEvent('MouseEvents');
-            evt.initMouseEvent('mousedown', true, true, view, 1, x+1, y+1, 0, 0, /*ctrl*/ new_tab, /*event.altKey*/0, /*event.shiftKey*/ new_window, /*event.metaKey*/ new_tab, 0, null);
+            evt.initMouseEvent('mousedown', true, true, view, 1, x + 1, y + 1, 0, 0, /*ctrl*/ new_tab, /*event.altKey*/0, /*event.shiftKey*/ new_window, /*event.metaKey*/ new_tab, 0, null);
             elem.dispatchEvent(evt);
 
             var evt = doc.createEvent('MouseEvents');
-            evt.initMouseEvent('click', true, true, view, 1, x+1, y+1, 0, 0, /*ctrl*/ new_tab, /*event.altKey*/0, /*event.shiftKey*/ new_window, /*event.metaKey*/ new_tab, 0, null);
+            evt.initMouseEvent('click', true, true, view, 1, x + 1, y + 1, 0, 0, /*ctrl*/ new_tab, /*event.altKey*/0, /*event.shiftKey*/ new_window, /*event.metaKey*/ new_tab, 0, null);
             elem.dispatchEvent(evt);
 
             // for 'pure' open calls without a new tab or window it doesn't
diff --git a/content/options.js b/content/options.js
index d330fd94..5863bb98 100644
--- a/content/options.js
+++ b/content/options.js
@@ -135,6 +135,8 @@ vimperator.Options = function() //{{{
 
     function storePreference(name, value, vimperator_branch)
     {
+        var branch;
+
         if (vimperator_branch)
             branch = vimperator_prefs;
         else
diff --git a/content/ui.js b/content/ui.js
index c7f4414b..91a851eb 100644
--- a/content/ui.js
+++ b/content/ui.js
@@ -1164,12 +1164,12 @@ vimperator.StatusLine = function() //{{{
             {
                 progress_str = "[";
                 var done = Math.floor(progress * 20);
-                for (i=0; i < done; i++)
+                for (var i = 0; i < done; i++)
                     progress_str += "=";
 
                 progress_str += ">";
 
-                for (i=19; i > done; i--)
+                for (var i = 19; i > done; i--)
                     progress_str += " ";
 
                 progress_str += "]";
diff --git a/content/vimperator.js b/content/vimperator.js
index fe6093c6..1a4fa6a4 100644
--- a/content/vimperator.js
+++ b/content/vimperator.js
@@ -328,7 +328,8 @@ const vimperator = (function() //{{{
             if (!string)
                 return [null, null, null];
 
-            if (match = string.match(/^([bwtglsv]):(\w+)/)) // Variable
+            var match = string.match(/^([bwtglsv]):(\w+)/);
+            if (match) // Variable
             {
                 // Other variables should be implemented
                 if (match[1] == "g")