diff --git a/src/image.js b/src/image.js
index 99c78d94..69c23b09 100644
--- a/src/image.js
+++ b/src/image.js
@@ -1,5 +1,4 @@
-var wikidata = require('./wikidata')
-var cache = {}
+var imageLoader = require('./imageLoader')
 var showTimer
 
 function showImage (url, dom) {
@@ -33,195 +32,6 @@ function show(img, options, div) {
   }
 }
 
-function imageLoader (data) {
-  if (this === window) {
-    if (data.id in cache) {
-      return cache[data.id]
-    }
-
-    return new imageLoader(data)
-  }
-
-  this.index = null
-  this.sources = []
-  this.found = []
-  this.data = {}
-
-  if (data.object.tags.image) {
-    img = data.object.tags.image
-
-    if (img.indexOf('File:') === 0) {
-      id = img.substr(5)
-      this.found.push(id)
-      this.data[id] = {
-        id: id,
-        type: 'wikimedia'
-      }
-    } else if (img.indexOf('http://commons.wikimedia.org/wiki/File:') === 0) {
-      id = decodeURIComponent(img.substr(39)).replace(/_/g, ' ')
-      this.found.push(id)
-      this.data[id] = {
-        id: id,
-        type: 'wikimedia'
-      }
-    } else if (img.indexOf('https://commons.wikimedia.org/wiki/File:') === 0) {
-      id = decodeURIComponent(img.substr(40)).replace(/_/g, ' ')
-      this.found.push(id)
-      this.data[id] = {
-        id: id,
-        type: 'wikimedia'
-      }
-    } else {
-      this.found.push(img)
-      this.data[img] = {
-        id: img,
-        type: 'url'
-      }
-    }
-  }
-
-  if (data.object.tags.wikidata) {
-    this.sources.push({
-      type: 'wikidata',
-      value: data.object.tags.wikidata
-    })
-  }
-
-  if (data.object.tags.wikimedia_commons) {
-    this.sources.push({
-      type: 'wikimedia_commons',
-      value: data.object.tags.wikimedia_commons,
-    })
-  }
-
-  cache[data.id] = this
-}
-
-imageLoader.prototype.loadWikidata = function (src, callback) {
-  var value = src.value
-
-  wikidata.load(value, function (err, result) {
-    if (result && result.claims && result.claims.P18) {
-      result.claims.P18.forEach(function (d) {
-        id = d.mainsnak.datavalue.value
-
-        if (this.found.indexOf(id) === -1) {
-          this.found.push(id)
-          this.data[id] = {
-            id: id,
-            type: 'wikimedia'
-          }
-        }
-      }.bind(this))
-    }
-
-    callback(err)
-  }.bind(this))
-}
-
-imageLoader.prototype.loadWikimediaCommons = function (src, callback) {
-  var value = src.value
-
-  if (value.substr(0, 9) === 'Category:') {
-    ajax('wikimedia', { page: value }, function (result) {
-      if (result.images) {
-        result.images.forEach(function (d) {
-          if (this.found.indexOf(d) === -1) {
-            this.found.push(d)
-	    this.data[d] = {
-	      id: d,
-	      type: 'wikimedia'
-	    }
-          }
-        }.bind(this))
-      }
-
-      callback(null)
-    }.bind(this))
-  } else if (value.substr(0, 5) === 'File:') {
-    var id = value.substr(5)
-    if (this.found.indexOf(id) === -1) {
-      this.found.push(id)
-      this.data[id] = {
-        id: id,
-        type: 'wikimedia'
-      }
-    }
-
-    callback(null)
-  } else {
-    callback(new Error('Can\'t parse value'))
-  }
-}
-
-imageLoader.prototype.handlePending = function () {
-  var pending = this.pendingCallbacks
-  delete this.pendingCallbacks
-
-  pending.forEach(function (c) {
-    this.callbackCurrent(c)
-  }.bind(this))
-}
-
-imageLoader.prototype.callbackCurrent = function (callback, wrap) {
-  if (this.index < this.found.length) {
-    return callback(null, this.data[this.found[this.index]])
-  }
-
-  if (this.pendingCallbacks) {
-    this.pendingCallbacks.push(callback)
-    return
-  }
-
-  if (this.sources.length) {
-    var src = this.sources.shift()
-    this.pendingCallbacks = [ callback ]
-
-    if (src.type === 'wikimedia_commons') {
-      this.loadWikimediaCommons(src, this.handlePending.bind(this))
-    } else if (src.type === 'wikidata') {
-      this.loadWikidata(src, this.handlePending.bind(this))
-    }
-
-    return
-  }
-
-  if (wrap && this.found.length) {
-    this.index = 0
-    return this.callbackCurrent(callback)
-  }
-
-  callback(null, null)
-}
-
-imageLoader.prototype.first = function (callback) {
-  this.index = 0
-
-  this.callbackCurrent(callback)
-}
-
-imageLoader.prototype.next = function (callback) {
-  if (this.index === null) {
-    this.index = 0
-  } else {
-    this.index ++
-  }
-
-  this.callbackCurrent(callback)
-}
-
-imageLoader.prototype.nextWrap = function (callback) {
-  if (this.index === null) {
-    this.index = 0
-  } else {
-    this.index ++
-  }
-
-  this.callbackCurrent(callback, true)
-}
-
-window.imageLoader = imageLoader
-
 register_hook('show-details', function (data, category, dom, callback) {
   var found = 0
   var div = document.createElement('div')
diff --git a/src/imageLoader.js b/src/imageLoader.js
new file mode 100644
index 00000000..ec9aa8f1
--- /dev/null
+++ b/src/imageLoader.js
@@ -0,0 +1,191 @@
+var wikidata = require('./wikidata')
+var cache = {}
+
+function imageLoader (data) {
+  if (this === window) {
+    if (data.id in cache) {
+      return cache[data.id]
+    }
+
+    return new imageLoader(data)
+  }
+
+  this.index = null
+  this.sources = []
+  this.found = []
+  this.data = {}
+
+  if (data.object.tags.image) {
+    img = data.object.tags.image
+
+    if (img.indexOf('File:') === 0) {
+      id = img.substr(5)
+      this.found.push(id)
+      this.data[id] = {
+        id: id,
+        type: 'wikimedia'
+      }
+    } else if (img.indexOf('http://commons.wikimedia.org/wiki/File:') === 0) {
+      id = decodeURIComponent(img.substr(39)).replace(/_/g, ' ')
+      this.found.push(id)
+      this.data[id] = {
+        id: id,
+        type: 'wikimedia'
+      }
+    } else if (img.indexOf('https://commons.wikimedia.org/wiki/File:') === 0) {
+      id = decodeURIComponent(img.substr(40)).replace(/_/g, ' ')
+      this.found.push(id)
+      this.data[id] = {
+        id: id,
+        type: 'wikimedia'
+      }
+    } else {
+      this.found.push(img)
+      this.data[img] = {
+        id: img,
+        type: 'url'
+      }
+    }
+  }
+
+  if (data.object.tags.wikidata) {
+    this.sources.push({
+      type: 'wikidata',
+      value: data.object.tags.wikidata
+    })
+  }
+
+  if (data.object.tags.wikimedia_commons) {
+    this.sources.push({
+      type: 'wikimedia_commons',
+      value: data.object.tags.wikimedia_commons,
+    })
+  }
+
+  cache[data.id] = this
+}
+
+imageLoader.prototype.loadWikidata = function (src, callback) {
+  var value = src.value
+
+  wikidata.load(value, function (err, result) {
+    if (result && result.claims && result.claims.P18) {
+      result.claims.P18.forEach(function (d) {
+        id = d.mainsnak.datavalue.value
+
+        if (this.found.indexOf(id) === -1) {
+          this.found.push(id)
+          this.data[id] = {
+            id: id,
+            type: 'wikimedia'
+          }
+        }
+      }.bind(this))
+    }
+
+    callback(err)
+  }.bind(this))
+}
+
+imageLoader.prototype.loadWikimediaCommons = function (src, callback) {
+  var value = src.value
+
+  if (value.substr(0, 9) === 'Category:') {
+    ajax('wikimedia', { page: value }, function (result) {
+      if (result.images) {
+        result.images.forEach(function (d) {
+          if (this.found.indexOf(d) === -1) {
+            this.found.push(d)
+	    this.data[d] = {
+	      id: d,
+	      type: 'wikimedia'
+	    }
+          }
+        }.bind(this))
+      }
+
+      callback(null)
+    }.bind(this))
+  } else if (value.substr(0, 5) === 'File:') {
+    var id = value.substr(5)
+    if (this.found.indexOf(id) === -1) {
+      this.found.push(id)
+      this.data[id] = {
+        id: id,
+        type: 'wikimedia'
+      }
+    }
+
+    callback(null)
+  } else {
+    callback(new Error('Can\'t parse value'))
+  }
+}
+
+imageLoader.prototype.handlePending = function () {
+  var pending = this.pendingCallbacks
+  delete this.pendingCallbacks
+
+  pending.forEach(function (c) {
+    this.callbackCurrent(c)
+  }.bind(this))
+}
+
+imageLoader.prototype.callbackCurrent = function (callback, wrap) {
+  if (this.index < this.found.length) {
+    return callback(null, this.data[this.found[this.index]])
+  }
+
+  if (this.pendingCallbacks) {
+    this.pendingCallbacks.push(callback)
+    return
+  }
+
+  if (this.sources.length) {
+    var src = this.sources.shift()
+    this.pendingCallbacks = [ callback ]
+
+    if (src.type === 'wikimedia_commons') {
+      this.loadWikimediaCommons(src, this.handlePending.bind(this))
+    } else if (src.type === 'wikidata') {
+      this.loadWikidata(src, this.handlePending.bind(this))
+    }
+
+    return
+  }
+
+  if (wrap && this.found.length) {
+    this.index = 0
+    return this.callbackCurrent(callback)
+  }
+
+  callback(null, null)
+}
+
+imageLoader.prototype.first = function (callback) {
+  this.index = 0
+
+  this.callbackCurrent(callback)
+}
+
+imageLoader.prototype.next = function (callback) {
+  if (this.index === null) {
+    this.index = 0
+  } else {
+    this.index ++
+  }
+
+  this.callbackCurrent(callback)
+}
+
+imageLoader.prototype.nextWrap = function (callback) {
+  if (this.index === null) {
+    this.index = 0
+  } else {
+    this.index ++
+  }
+
+  this.callbackCurrent(callback, true)
+}
+
+module.exports = imageLoader