fix for #5017

diff --git a/src/ajax.js b/src/ajax.js
index 4b22205..62b3ac0 100644 (file)
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -275,7 +275,7 @@ jQuery.extend({
                if ( s.dataType === "script" && type === "GET" && parts
                        && ( parts[1] && parts[1] !== location.protocol || parts[2] !== location.host )) {
 
-                       var head = document.getElementsByTagName("head")[0];
+                       var head = document.getElementsByTagName("head")[0] || document.documentElement;
                        var script = document.createElement("script");
                        script.src = s.url;
                        if ( s.scriptCharset ) {