update

Static/script/captcha.js

@@ -0,0 +1,7 @@
+function recaptcha(obj) {
+	var arr = $(obj).attr('src').split(",");
+	var rand = Math.random();
+	rand = rand + ".html";
+	arr[1] = rand;
+	$(obj).attr('src',arr.join(","));
+}