1 files changed, 4 insertions, 0 deletions
diff --git a/src/Browser.js b/src/Browser.js
index d2e8608d..6ec083fa 100644
--- a/src/Browser.js
+++ b/src/Browser.js
@@ -53,6 +53,10 @@ Browser.prototype = {
   },
 
   xhr: function(method, url, post, callback){
+    if (isFunction(post)) {
+      callback = post;
+      post = null;
+    }
     var xhr = new this.XHR();
     xhr.open(method, url, true);
     xhr.onreadystatechange = function() {