No ticket: compress ajax. Close gh-1041.

src/ajax/jsonp.js

 var oldCallbacks = [],
-	rquestion = /\?/,
-	rjsonp = /(=)\?(?=&|$)|\?\?/,
-	nonce = jQuery.now();
+	rjsonp = /(=)\?(?=&|$)|\?\?/;
 
 // Default jsonp settings
 jQuery.ajaxSetup({
 	jsonp: "callback",
 	jsonpCallback: function() {
-		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
+		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( ajax_nonce++ ) );
 		this[ callback ] = true;
 		return callback;
 	}
@@ -17,30 +15,24 @@ jQuery.ajaxSetup({
 jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
 
 	var callbackName, overwritten, responseContainer,
-		data = s.data,
-		url = s.url,
-		hasCallback = s.jsonp !== false,
-		replaceInUrl = hasCallback && rjsonp.test( url ),
-		replaceInData = hasCallback && !replaceInUrl && typeof data === "string" &&
-			!( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") &&
-			rjsonp.test( data );
+		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
+			"url" :
+			typeof s.data === "string" && !( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") && rjsonp.test( s.data ) && "data"
+		);
 
 	// Handle iff the expected data type is "jsonp" or we have a parameter to set
-	if ( s.dataTypes[ 0 ] === "jsonp" || replaceInUrl || replaceInData ) {
+	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
 
 		// Get callback name, remembering preexisting value associated with it
 		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
 			s.jsonpCallback() :
 			s.jsonpCallback;
-		overwritten = window[ callbackName ];
 
 		// Insert callback into url or form data
-		if ( replaceInUrl ) {
-			s.url = url.replace( rjsonp, "$1" + callbackName );
-		} else if ( replaceInData ) {
-			s.data = data.replace( rjsonp, "$1" + callbackName );
-		} else if ( hasCallback ) {
-			s.url += ( rquestion.test( url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
+		if ( jsonProp ) {
+			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
+		} else if ( s.jsonp !== false ) {
+			s.url += ( ajax_rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
 		}
 
 		// Use data converter to retrieve json after script execution
@@ -55,6 +47,7 @@ jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
 		s.dataTypes[ 0 ] = "json";
 
 		// Install callback
+		overwritten = window[ callbackName ];
 		window[ callbackName ] = function() {
 			responseContainer = arguments;
 		};

src/ajax/script.js

@@ -4,7 +4,7 @@ jQuery.ajaxSetup({
 		script: "text/javascript, application/javascript, application/ecmascript, application/x-ecmascript"
 	},
 	contents: {
-		script: /javascript|ecmascript/
+		script: /(?:java|ecma)script/
 	},
 	converters: {
 		"text script": function( text ) {
@@ -32,13 +32,13 @@ jQuery.ajaxTransport( "script", function(s) {
 	if ( s.crossDomain ) {
 
 		var script,
-			head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement;
+			head = document.head || jQuery("head")[0] || document.documentElement;
 
 		return {
 
 			send: function( _, callback ) {
 
-				script = document.createElement( "script" );
+				script = document.createElement("script");
 
 				script.async = true;
 
@@ -57,12 +57,12 @@ jQuery.ajaxTransport( "script", function(s) {
 						script.onload = script.onreadystatechange = null;
 
 						// Remove the script
-						if ( head && script.parentNode ) {
-							head.removeChild( script );
+						if ( script.parentNode ) {
+							script.parentNode.removeChild( script );
 						}
 
 						// Dereference the script
-						script = undefined;
+						script = null;
 
 						// Callback if not abort
 						if ( !isAbort ) {
@@ -70,14 +70,15 @@ jQuery.ajaxTransport( "script", function(s) {
 						}
 					}
 				};
-				// Use insertBefore instead of appendChild  to circumvent an IE6 bug.
-				// This arises when a base node is used (#2709 and #4378).
+
+				// Circumvent IE6 bugs with base elements (#2709 and #4378) by prepending
+				// Use native DOM manipulation to avoid our domManip AJAX trickery
 				head.insertBefore( script, head.firstChild );
 			},
 
 			abort: function() {
 				if ( script ) {
-					script.onload( 0, 1 );
+					script.onload( undefined, true );
 				}
 			}
 		};

src/ajax/xhr.js

-var xhrCallbacks,
+var xhrCallbacks, xhrSupported,
+	xhrId = 0,
 	// #5280: Internet Explorer will keep connections alive if we don't abort on unload
-	xhrOnUnloadAbort = window.ActiveXObject ? function() {
+	xhrOnUnloadAbort = window.ActiveXObject && function() {
 		// Abort all pending requests
-		for ( var key in xhrCallbacks ) {
-			xhrCallbacks[ key ]( 0, 1 );
+		var key;
+		for ( key in xhrCallbacks ) {
+			xhrCallbacks[ key ]( undefined, true );
 		}
-	} : false,
-	xhrId = 0;
+	};
 
 // Functions to create xhrs
 function createStandardXHR() {
@@ -17,7 +18,7 @@ function createStandardXHR() {
 
 function createActiveXHR() {
 	try {
-		return new window.ActiveXObject( "Microsoft.XMLHTTP" );
+		return new window.ActiveXObject("Microsoft.XMLHTTP");
 	} catch( e ) {}
 }
 
@@ -37,15 +38,12 @@ jQuery.ajaxSettings.xhr = window.ActiveXObject ?
 	createStandardXHR;
 
 // Determine support properties
-(function( xhr ) {
-	jQuery.extend( jQuery.support, {
-		ajax: !!xhr,
-		cors: !!xhr && ( "withCredentials" in xhr )
-	});
-})( jQuery.ajaxSettings.xhr() );
+xhrSupported = jQuery.ajaxSettings.xhr();
+jQuery.support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
+xhrSupported = jQuery.support.ajax = !!xhrSupported;
 
 // Create transport if the browser can provide an xhr
-if ( jQuery.support.ajax ) {
+if ( xhrSupported ) {
 
 	jQuery.ajaxTransport(function( s ) {
 		// Cross domain only allowed if supported through XMLHttpRequest
@@ -86,7 +84,7 @@ if ( jQuery.support.ajax ) {
 					// (it can always be set on a per-request basis or even using ajaxSetup)
 					// For same-domain requests, won't change header if already provided.
 					if ( !s.crossDomain && !headers["X-Requested-With"] ) {
-						headers[ "X-Requested-With" ] = "XMLHttpRequest";
+						headers["X-Requested-With"] = "XMLHttpRequest";
 					}
 
 					// Need an extra try/catch for cross domain requests in Firefox 3
@@ -136,10 +134,10 @@ if ( jQuery.support.ajax ) {
 										xhr.abort();
 									}
 								} else {
-									status = xhr.status;
-									responseHeaders = xhr.getAllResponseHeaders();
 									responses = {};
+									status = xhr.status;
 									xml = xhr.responseXML;
+									responseHeaders = xhr.getAllResponseHeaders();
 
 									// Construct response list
 									if ( xml && xml.documentElement /* #4958 */ ) {
@@ -211,7 +209,7 @@ if ( jQuery.support.ajax ) {
 
 				abort: function() {
 					if ( callback ) {
-						callback(0,1);
+						callback( undefined, true );
 					}
 				}
 			};