add Ox.post(like Ox.get)

source/Ox/js/Request.js

@@ -289,3 +289,32 @@ Ox.getJSONP = function(url, callback) {
         }));
     }, callback);
 };
+
+/*@
+Ox.post <f> post to a remote resource
+    (url, data, callback) -> <u> undefined
+    url <s> Remote URL
+    data <s> data to send in post request
+    callback <f> Callback function
+        data <s|null> The contents of the remote resource, or `null` on error
+        error <o|null> Error, or `null` on success
+            code <n> Status code
+            text <s> Status text
+@*/
+Ox.post = function(url, data, callback) {
+    var request = new XMLHttpRequest();
+    request.open('post', url, true);
+    request.onreadystatechange = function() {
+        if (request.readyState == 4) {
+            if (request.status == 200) {
+                callback(request.responseText, null);
+            } else {
+                callback(null, {
+                    code: request.status,
+                    text: request.statusText
+                });
+            }
+        }
+    };
+    request.send(data);
+};