diff --git a/js/jquery.tag.inserter.js b/js/jquery.tag.inserter.js
new file mode 100644
index 00000000..902c9e76
--- /dev/null
+++ b/js/jquery.tag.inserter.js
@@ -0,0 +1,24 @@
+(function() {
+	// Insert a script tag pointing at the desired version of jQuery
+
+	// Get the version from the url
+	var jqueryRE = /[\\?&]jquery=([^&#]*)/,
+		results = jqueryRE.exec( location.search ),
+		version = "",
+		jq,
+		myScriptTag = document.getElementsByTagName( "script" )[document.getElementsByTagName( "script" ).length - 1],
+		baseUrl = myScriptTag.src.replace( /(.*)\/.*$/, "$1/" ),
+		url = baseUrl + "jquery-1.7.1.js";
+
+	if( results ) {
+		version = decodeURIComponent(results[results.length - 1].replace(/\+/g, " "));
+	}
+
+	switch( version ) {
+		case "1.6.4":
+			url = baseUrl + "jquery-1.6.4.js";
+			break;
+	}
+
+	document.write( "<script src='"+url+"'></script>" );
+}());
\ No newline at end of file