diff --git a/src/ajax.js b/src/ajax.js
index 62c3d8ae1..d0a8a4f12 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -194,25 +194,6 @@ jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSucces
 	};
 });
 
-jQuery.each( [ "get", "post" ], function( i, method ) {
-	jQuery[ method ] = function( url, data, callback, type ) {
-		// shift arguments if data argument was omitted
-		if ( jQuery.isFunction( data ) ) {
-			type = type || callback;
-			callback = data;
-			data = undefined;
-		}
-
-		return jQuery.ajax({
-			url: url,
-			type: method,
-			dataType: type,
-			data: data,
-			success: callback
-		});
-	};
-});
-
 jQuery.extend({
 
 	// Counter for holding the number of active queries
@@ -694,15 +675,34 @@ jQuery.extend({
 		return jqXHR;
 	},
 
-	getScript: function( url, callback ) {
-		return jQuery.get( url, undefined, callback, "script" );
-	},
-
 	getJSON: function( url, data, callback ) {
 		return jQuery.get( url, data, callback, "json" );
+	},
+
+	getScript: function( url, callback ) {
+		return jQuery.get( url, undefined, callback, "script" );
 	}
 });
 
+jQuery.each( [ "get", "post" ], function( i, method ) {
+	jQuery[ method ] = function( url, data, callback, type ) {
+		// shift arguments if data argument was omitted
+		if ( jQuery.isFunction( data ) ) {
+			type = type || callback;
+			callback = data;
+			data = undefined;
+		}
+
+		return jQuery.ajax({
+			url: url,
+			type: method,
+			dataType: type,
+			data: data,
+			success: callback
+		});
+	};
+});
+
 /* Handles responses to an ajax request:
  * - finds the right dataType (mediates between content-type and expected dataType)
  * - returns the corresponding response
diff --git a/src/manipulation.js b/src/manipulation.js
index 640dfcd6f..f37ec421a 100644
--- a/src/manipulation.js
+++ b/src/manipulation.js
@@ -256,14 +256,7 @@ jQuery.fn.extend({
 
 							if ( node.src ) {
 								// Hope ajax is available...
-								jQuery.ajax({
-									url: node.src,
-									type: "GET",
-									dataType: "script",
-									async: false,
-									global: false,
-									"throws": true
-								});
+								jQuery._evalUrl( node.src );
 							} else {
 								jQuery.globalEval( node.textContent.replace( rcleanScript, "" ) );
 							}
@@ -465,6 +458,17 @@ jQuery.extend({
 			data_user.discard( elem );
 			data_priv.discard( elem );
 		}
+	},
+
+	_evalUrl: function( url ) {
+		return jQuery.ajax({
+			url: url,
+			type: "GET",
+			dataType: "text",
+			async: false,
+			global: false,
+			success: jQuery.globalEval
+		});
 	}
 });
 
diff --git a/test/unit/manipulation.js b/test/unit/manipulation.js
index 30710da58..09b425c8a 100644
--- a/test/unit/manipulation.js
+++ b/test/unit/manipulation.js
@@ -1880,14 +1880,19 @@ test( "html() - script exceptions bubble (#11743)", function() {
 		ok( false, "Exception ignored" );
 	}, "Exception bubbled from inline script" );
 
-	var onerror = window.onerror;
-	window.onerror = function() {
-		ok( true, "Exception thrown in remote script" );
-		window.onerror = onerror;
-	};
+	if ( jQuery.ajax ) {
+		var onerror = window.onerror;
+		window.onerror = function() {
+			ok( true, "Exception thrown in remote script" );
+		};
 
-	jQuery("#qunit-fixture").html("<script src='data/badcall.js'></script>");
-	ok( true, "Exception ignored" );
+		jQuery("#qunit-fixture").html("<script src='data/badcall.js'></script>");
+		ok( true, "Exception ignored" );
+		window.onerror = onerror;
+	} else {
+		ok( true, "No jQuery.ajax" );
+		ok( true, "No jQuery.ajax" );
+	}
 });
 
 test( "checked state is cloned with clone()", function() {
@@ -1927,7 +1932,7 @@ testIframeWithCallback( "buildFragment works even if document[0] is iframe's win
 
 test( "script evaluation (#11795)", function() {
 
-	expect( 11 );
+	expect( 13 );
 
 	var scriptsIn, scriptsOut,
 		fixture = jQuery("#qunit-fixture").empty(),
@@ -1968,6 +1973,44 @@ test( "script evaluation (#11795)", function() {
 	fixture.append( scriptsOut.detach() );
 	deepEqual( fixture.children("script").get(), scriptsOut.get(), "Scripts detached without reevaluation" );
 	objGlobal.ok = isOk;
+
+	if ( jQuery.ajax ) {
+		Globals.register("testBar");
+		jQuery("#qunit-fixture").append( "<script src='" + url("data/test.js") + "'/>" );
+		strictEqual( window["testBar"], "bar", "Global script evaluation" );
+	} else {
+		ok( true, "No jQuery.ajax" );
+		ok( true, "No jQuery.ajax" );
+	}
+});
+
+test( "jQuery._evalUrl (#12838)", function() {
+
+	expect( 5 );
+
+	var message, expectedArgument,
+		ajax = jQuery.ajax,
+		evalUrl = jQuery._evalUrl;
+
+	message = "jQuery.ajax implementation";
+	expectedArgument = 1;
+	jQuery.ajax = function( input ) {
+		equal( ( input.url || input ).slice( -1 ), expectedArgument, message );
+		expectedArgument++;
+	};
+	jQuery("#qunit-fixture").append("<script src='1'/><script src='2'/>");
+	equal( expectedArgument, 3, "synchronous execution" );
+
+	message = "custom implementation";
+	expectedArgument = 3;
+	jQuery._evalUrl = jQuery.ajax;
+	jQuery.ajax = function( options ) {
+		strictEqual( options, {}, "Unexpected call to jQuery.ajax" );
+	};
+	jQuery("#qunit-fixture").append("<script src='3'/><script src='4'/>");
+
+	jQuery.ajax = ajax;
+	jQuery._evalUrl = evalUrl;
 });
 
 test( "insertAfter, insertBefore, etc do not work when destination is original element. Element is removed (#4087)", function() {