diff --git a/4chan_x.user.js b/4chan_x.user.js
index 18ea61cd5..55dfbbe6e 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -514,6 +514,9 @@
       }
       size = unit > 1 ? Math.round(size * 100) / 100 : Math.round(size);
       return "" + size + " " + ['B', 'KB', 'MB', 'GB'][unit];
+    },
+    hidden: function() {
+      return d.hidden || d.oHidden || d.mozHidden || d.webkitHidden;
     }
   });
 
@@ -1837,7 +1840,7 @@
       if (QR.captcha.isEnabled && /captcha|verification/i.test(el.textContent)) {
         $('[autocomplete]', QR.el).focus();
       }
-      if (d.hidden || d.oHidden || d.mozHidden || d.webkitHidden) {
+      if ($.hidden()) {
         return alert(el.textContent);
       }
     },
@@ -3040,9 +3043,7 @@
         return setTimeout(Updater.update, 500);
       },
       visibility: function() {
-        var state;
-        state = d.visibilityState || d.oVisibilityState || d.mozVisibilityState || d.webkitVisibilityState;
-        if (state !== 'visible') {
+        if ($.hidden()) {
           return;
         }
         Updater.unsuccessfulFetchCount = 0;
@@ -3078,7 +3079,7 @@
         return Updater.scrollBG = this.checked ? function() {
           return true;
         } : function() {
-          return !(d.hidden || d.oHidden || d.mozHidden || d.webkitHidden);
+          return !$.hidden();
         };
       },
       load: function() {
@@ -3174,7 +3175,7 @@
       var i, j;
       i = +Conf['Interval'];
       j = Math.min(this.unsuccessfulFetchCount, 9);
-      if (!(d.hidden || d.oHidden || d.mozHidden || d.webkitHidden)) {
+      if (!$.hidden()) {
         j = Math.min(j, 6);
       }
       return Math.max(i, [5, 10, 15, 20, 30, 60, 90, 120, 240, 300][j]);
diff --git a/script.coffee b/script.coffee
index 5a49378a0..f098cd9c6 100644
--- a/script.coffee
+++ b/script.coffee
@@ -396,6 +396,8 @@ $.extend $,
         # Round to an integer otherwise.
         Math.round size
     "#{size} #{['B', 'KB', 'MB', 'GB'][unit]}"
+  hidden: ->
+    d.hidden or d.oHidden or d.mozHidden or d.webkitHidden
 
 $.cache.requests = {}
 
@@ -1419,7 +1421,7 @@ QR =
     if QR.captcha.isEnabled and /captcha|verification/i.test el.textContent
       # Focus the captcha input on captcha error.
       $('[autocomplete]', QR.el).focus()
-    alert el.textContent if d.hidden or d.oHidden or d.mozHidden or d.webkitHidden
+    alert el.textContent if $.hidden()
   cleanError: ->
     $('.warning', QR.el).textContent = null
 
@@ -2463,8 +2465,7 @@ Updater =
       Updater.unsuccessfulFetchCount = 0
       setTimeout Updater.update, 500
     visibility: ->
-      state = d.visibilityState or d.oVisibilityState or d.mozVisibilityState or d.webkitVisibilityState
-      return if state isnt 'visible'
+      return if $.hidden()
       # Reset the counter when we focus this tab.
       Updater.unsuccessfulFetchCount = 0
       if Updater.timer.textContent < -Conf['Interval']
@@ -2492,7 +2493,7 @@ Updater =
         if @checked
           -> true
         else
-          -> !(d.hidden or d.oHidden or d.mozHidden or d.webkitHidden)
+          -> ! $.hidden()
     load: ->
       switch @status
         when 404
@@ -2570,7 +2571,7 @@ Updater =
   getInterval: ->
     i = +Conf['Interval']
     j = Math.min @unsuccessfulFetchCount, 9
-    unless d.hidden or d.oHidden or d.mozHidden or d.webkitHidden
+    unless $.hidden()
       # Don't increase the refresh rate too much on visible tabs.
       j = Math.min j, 6
     Math.max i, [5, 10, 15, 20, 30, 60, 90, 120, 240, 300][j]