src/ajax.js

   1 (function( jQuery ) {
   2
   3 var jsc = jQuery.now(),
   4         rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
   5         rselectTextarea = /^(?:select|textarea)/i,
   6         rinput = /^(?:color|date|datetime|email|hidden|month|number|password|range|search|tel|text|time|url|week)$/i,
   7         rbracket = /\[\]$/,
   8         jsre = /\=\?(&|$)/,
   9         rquery = /\?/,
  10         rts = /([?&])_=[^&]*(&?)/,
  11         rurl = /^(\w+:)?\/\/([^\/?#]+)/,
  12         r20 = /%20/g,
  13
  14         // Keep a copy of the old load method
  15         _load = jQuery.fn.load;
  16
  17 jQuery.fn.extend({
  18         load: function( url, params, callback ) {
  19                 if ( typeof url !== "string" && _load ) {
  20                         return _load.apply( this, arguments );
  21
  22                 // Don't do a request if no elements are being requested
  23                 } else if ( !this.length ) {
  24                         return this;
  25                 }
  26
  27                 var off = url.indexOf(" ");
  28                 if ( off >= 0 ) {
  29                         var selector = url.slice(off, url.length);
  30                         url = url.slice(0, off);
  31                 }
  32
  33                 // Default to a GET request
  34                 var type = "GET";
  35
  36                 // If the second parameter was provided
  37                 if ( params ) {
  38                         // If it's a function
  39                         if ( jQuery.isFunction( params ) ) {
  40                                 // We assume that it's the callback
  41                                 callback = params;
  42                                 params = null;
  43
  44                         // Otherwise, build a param string
  45                         } else if ( typeof params === "object" ) {
  46                                 params = jQuery.param( params, jQuery.ajaxSettings.traditional );
  47                                 type = "POST";
  48                         }
  49                 }
  50
  51                 var self = this;
  52
  53                 // Request the remote document
  54                 jQuery.ajax({
  55                         url: url,
  56                         type: type,
  57                         dataType: "html",
  58                         data: params,
  59                         complete: function( res, status ) {
  60                                 // If successful, inject the HTML into all the matched elements
  61                                 if ( status === "success" || status === "notmodified" ) {
  62                                         // See if a selector was specified
  63                                         self.html( selector ?
  64                                                 // Create a dummy div to hold the results
  65                                                 jQuery("<div>")
  66                                                         // inject the contents of the document in, removing the scripts
  67                                                         // to avoid any 'Permission Denied' errors in IE
  68                                                         .append(res.responseText.replace(rscript, ""))
  69
  70                                                         // Locate the specified elements
  71                                                         .find(selector) :
  72
  73                                                 // If not, just inject the full result
  74                                                 res.responseText );
  75                                 }
  76
  77                                 if ( callback ) {
  78                                         self.each( callback, [res.responseText, status, res] );
  79                                 }
  80                         }
  81                 });
  82
  83                 return this;
  84         },
  85
  86         serialize: function() {
  87                 return jQuery.param(this.serializeArray());
  88         },
  89
  90         serializeArray: function() {
  91                 return this.map(function() {
  92                         return this.elements ? jQuery.makeArray(this.elements) : this;
  93                 })
  94                 .filter(function() {
  95                         return this.name && !this.disabled &&
  96                                 (this.checked || rselectTextarea.test(this.nodeName) ||
  97                                         rinput.test(this.type));
  98                 })
  99                 .map(function( i, elem ) {
 100                         var val = jQuery(this).val();
 101
 102                         return val == null ?
 103                                 null :
 104                                 jQuery.isArray(val) ?
 105                                         jQuery.map( val, function( val, i ) {
 106                                                 return { name: elem.name, value: val };
 107                                         }) :
 108                                         { name: elem.name, value: val };
 109                 }).get();
 110         }
 111 });
 112
 113 // Attach a bunch of functions for handling common AJAX events
 114 jQuery.each( "ajaxStart ajaxStop ajaxComplete ajaxError ajaxSuccess ajaxSend".split(" "), function( i, o ) {
 115         jQuery.fn[o] = function( f ) {
 116                 return this.bind(o, f);
 117         };
 118 });
 119
 120 jQuery.extend({
 121         get: function( url, data, callback, type ) {
 122                 // shift arguments if data argument was omited
 123                 if ( jQuery.isFunction( data ) ) {
 124                         type = type || callback;
 125                         callback = data;
 126                         data = null;
 127                 }
 128
 129                 return jQuery.ajax({
 130                         type: "GET",
 131                         url: url,
 132                         data: data,
 133                         success: callback,
 134                         dataType: type
 135                 });
 136         },
 137
 138         getScript: function( url, callback ) {
 139                 return jQuery.get(url, null, callback, "script");
 140         },
 141
 142         getJSON: function( url, data, callback ) {
 143                 return jQuery.get(url, data, callback, "json");
 144         },
 145
 146         post: function( url, data, callback, type ) {
 147                 // shift arguments if data argument was omited
 148                 if ( jQuery.isFunction( data ) ) {
 149                         type = type || callback;
 150                         callback = data;
 151                         data = {};
 152                 }
 153
 154                 return jQuery.ajax({
 155                         type: "POST",
 156                         url: url,
 157                         data: data,
 158                         success: callback,
 159                         dataType: type
 160                 });
 161         },
 162
 163         ajaxSetup: function( settings ) {
 164                 jQuery.extend( jQuery.ajaxSettings, settings );
 165         },
 166
 167         ajaxSettings: {
 168                 url: location.href,
 169                 global: true,
 170                 type: "GET",
 171                 contentType: "application/x-www-form-urlencoded",
 172                 processData: true,
 173                 async: true,
 174                 /*
 175                 timeout: 0,
 176                 data: null,
 177                 username: null,
 178                 password: null,
 179                 traditional: false,
 180                 */
 181                 // Create the request object; Microsoft failed to properly
 182                 // implement the XMLHttpRequest in IE7 (can't request local files),
 183                 // so we use the ActiveXObject when it is available
 184                 // This function can be overriden by calling jQuery.ajaxSetup
 185                 xhr: window.XMLHttpRequest && (window.location.protocol !== "file:" || !window.ActiveXObject) ?
 186                         function() {
 187                                 return new window.XMLHttpRequest();
 188                         } :
 189                         function() {
 190                                 try {
 191                                         return new window.ActiveXObject("Microsoft.XMLHTTP");
 192                                 } catch(e) {}
 193                         },
 194                 accepts: {
 195                         xml: "application/xml, text/xml",
 196                         html: "text/html",
 197                         script: "text/javascript, application/javascript",
 198                         json: "application/json, text/javascript",
 199                         text: "text/plain",
 200                         _default: "*/*"
 201                 }
 202         },
 203
 204         ajax: function( origSettings ) {
 205                 var s = jQuery.extend(true, {}, jQuery.ajaxSettings, origSettings),
 206                         jsonp, status, data, type = s.type.toUpperCase();
 207
 208                 s.context = origSettings && origSettings.context || s;
 209
 210                 // convert data if not already a string
 211                 if ( s.data && s.processData && typeof s.data !== "string" ) {
 212                         s.data = jQuery.param( s.data, s.traditional );
 213                 }
 214
 215                 // Handle JSONP Parameter Callbacks
 216                 if ( s.dataType === "jsonp" ) {
 217                         if ( type === "GET" ) {
 218                                 if ( !jsre.test( s.url ) ) {
 219                                         s.url += (rquery.test( s.url ) ? "&" : "?") + (s.jsonp || "callback") + "=?";
 220                                 }
 221                         } else if ( !s.data || !jsre.test(s.data) ) {
 222                                 s.data = (s.data ? s.data + "&" : "") + (s.jsonp || "callback") + "=?";
 223                         }
 224                         s.dataType = "json";
 225                 }
 226
 227                 // Build temporary JSONP function
 228                 if ( s.dataType === "json" && (s.data && jsre.test(s.data) || jsre.test(s.url)) ) {
 229                         jsonp = s.jsonpCallback || ("jsonp" + jsc++);
 230
 231                         // Replace the =? sequence both in the query string and the data
 232                         if ( s.data ) {
 233                                 s.data = (s.data + "").replace(jsre, "=" + jsonp + "$1");
 234                         }
 235
 236                         s.url = s.url.replace(jsre, "=" + jsonp + "$1");
 237
 238                         // We need to make sure
 239                         // that a JSONP style response is executed properly
 240                         s.dataType = "script";
 241
 242                         // Handle JSONP-style loading
 243                         var customJsonp = window[ jsonp ];
 244
 245                         window[ jsonp ] = function( tmp ) {
 246                                 data = tmp;
 247                                 jQuery.ajax.handleSuccess( s, xhr, status, data );
 248                                 jQuery.ajax.handleComplete( s, xhr, status, data );
 249
 250                                 if ( jQuery.isFunction( customJsonp ) ) {
 251                                         customJsonp( tmp );
 252
 253                                 } else {
 254                                         // Garbage collect
 255                                         window[ jsonp ] = undefined;
 256
 257                                         try {
 258                                                 delete window[ jsonp ];
 259                                         } catch( jsonpError ) {}
 260                                 }
 261
 262                                 if ( head ) {
 263                                         head.removeChild( script );
 264                                 }
 265                         };
 266                 }
 267
 268                 if ( s.dataType === "script" && s.cache === null ) {
 269                         s.cache = false;
 270                 }
 271
 272                 if ( s.cache === false && type === "GET" ) {
 273                         var ts = jQuery.now();
 274
 275                         // try replacing _= if it is there
 276                         var ret = s.url.replace(rts, "$1_=" + ts + "$2");
 277
 278                         // if nothing was replaced, add timestamp to the end
 279                         s.url = ret + ((ret === s.url) ? (rquery.test(s.url) ? "&" : "?") + "_=" + ts : "");
 280                 }
 281
 282                 // If data is available, append data to url for get requests
 283                 if ( s.data && type === "GET" ) {
 284                         s.url += (rquery.test(s.url) ? "&" : "?") + s.data;
 285                 }
 286
 287                 // Watch for a new set of requests
 288                 if ( s.global && jQuery.ajax.active++ === 0 ) {
 289                         jQuery.event.trigger( "ajaxStart" );
 290                 }
 291
 292                 // Matches an absolute URL, and saves the domain
 293                 var parts = rurl.exec( s.url ),
 294                         remote = parts && (parts[1] && parts[1] !== location.protocol || parts[2] !== location.host);
 295
 296                 // If we're requesting a remote document
 297                 // and trying to load JSON or Script with a GET
 298                 if ( s.dataType === "script" && type === "GET" && remote ) {
 299                         var head = document.getElementsByTagName("head")[0] || document.documentElement;
 300                         var script = document.createElement("script");
 301                         script.src = s.url;
 302                         if ( s.scriptCharset ) {
 303                                 script.charset = s.scriptCharset;
 304                         }
 305
 306                         // Handle Script loading
 307                         if ( !jsonp ) {
 308                                 var done = false;
 309
 310                                 // Attach handlers for all browsers
 311                                 script.onload = script.onreadystatechange = function() {
 312                                         if ( !done && (!this.readyState ||
 313                                                         this.readyState === "loaded" || this.readyState === "complete") ) {
 314                                                 done = true;
 315                                                 jQuery.ajax.handleSuccess( s, xhr, status, data );
 316                                                 jQuery.ajax.handleComplete( s, xhr, status, data );
 317
 318                                                 // Handle memory leak in IE
 319                                                 script.onload = script.onreadystatechange = null;
 320                                                 if ( head && script.parentNode ) {
 321                                                         head.removeChild( script );
 322                                                 }
 323                                         }
 324                                 };
 325                         }
 326
 327                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 328                         // This arises when a base node is used (#2709 and #4378).
 329                         head.insertBefore( script, head.firstChild );
 330
 331                         // We handle everything using the script element injection
 332                         return undefined;
 333                 }
 334
 335                 var requestDone = false;
 336
 337                 // Create the request object
 338                 var xhr = s.xhr();
 339
 340                 if ( !xhr ) {
 341                         return;
 342                 }
 343
 344                 // Open the socket
 345                 // Passing null username, generates a login popup on Opera (#2865)
 346                 if ( s.username ) {
 347                         xhr.open(type, s.url, s.async, s.username, s.password);
 348                 } else {
 349                         xhr.open(type, s.url, s.async);
 350                 }
 351
 352                 // Need an extra try/catch for cross domain requests in Firefox 3
 353                 try {
 354                         // Set the correct header, if data is being sent
 355                         if ( s.data || origSettings && origSettings.contentType ) {
 356                                 xhr.setRequestHeader("Content-Type", s.contentType);
 357                         }
 358
 359                         // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 360                         if ( s.ifModified ) {
 361                                 if ( jQuery.lastModified[s.url] ) {
 362                                         xhr.setRequestHeader("If-Modified-Since", jQuery.lastModified[s.url]);
 363                                 }
 364
 365                                 if ( jQuery.ajax.etag[s.url] ) {
 366                                         xhr.setRequestHeader("If-None-Match", jQuery.ajax.etag[s.url]);
 367                                 }
 368                         }
 369
 370                         // Set header so the called script knows that it's an XMLHttpRequest
 371                         // Only send the header if it's not a remote XHR
 372                         if ( !remote ) {
 373                                 xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
 374                         }
 375
 376                         // Set the Accepts header for the server, depending on the dataType
 377                         xhr.setRequestHeader("Accept", s.dataType && s.accepts[ s.dataType ] ?
 378                                 s.accepts[ s.dataType ] + ", */*" :
 379                                 s.accepts._default );
 380                 } catch( headerError ) {}
 381
 382                 // Allow custom headers/mimetypes and early abort
 383                 if ( s.beforeSend && s.beforeSend.call(s.context, xhr, s) === false ) {
 384                         // Handle the global AJAX counter
 385                         if ( s.global && jQuery.ajax.active-- === 1 ) {
 386                                 jQuery.event.trigger( "ajaxStop" );
 387                         }
 388
 389                         // close opended socket
 390                         xhr.abort();
 391                         return false;
 392                 }
 393
 394                 if ( s.global ) {
 395                         jQuery.ajax.triggerGlobal( s, "ajaxSend", [xhr, s] );
 396                 }
 397
 398                 // Wait for a response to come back
 399                 var onreadystatechange = xhr.onreadystatechange = function( isTimeout ) {
 400                         // The request was aborted
 401                         if ( !xhr || xhr.readyState === 0 || isTimeout === "abort" ) {
 402                                 // Opera doesn't call onreadystatechange before this point
 403                                 // so we simulate the call
 404                                 if ( !requestDone ) {
 405                                         jQuery.ajax.handleComplete( s, xhr, status, data );
 406                                 }
 407
 408                                 requestDone = true;
 409                                 if ( xhr ) {
 410                                         xhr.onreadystatechange = jQuery.noop;
 411                                 }
 412
 413                         // The transfer is complete and the data is available, or the request timed out
 414                         } else if ( !requestDone && xhr && (xhr.readyState === 4 || isTimeout === "timeout") ) {
 415                                 requestDone = true;
 416                                 xhr.onreadystatechange = jQuery.noop;
 417
 418                                 status = isTimeout === "timeout" ?
 419                                         "timeout" :
 420                                         !jQuery.ajax.httpSuccess( xhr ) ?
 421                                                 "error" :
 422                                                 s.ifModified && jQuery.ajax.httpNotModified( xhr, s.url ) ?
 423                                                         "notmodified" :
 424                                                         "success";
 425
 426                                 var errMsg;
 427
 428                                 if ( status === "success" ) {
 429                                         // Watch for, and catch, XML document parse errors
 430                                         try {
 431                                                 // process the data (runs the xml through httpData regardless of callback)
 432                                                 data = jQuery.ajax.httpData( xhr, s.dataType, s );
 433                                         } catch( parserError ) {
 434                                                 status = "parsererror";
 435                                                 errMsg = parserError;
 436                                         }
 437                                 }
 438
 439                                 // Make sure that the request was successful or notmodified
 440                                 if ( status === "success" || status === "notmodified" ) {
 441                                         // JSONP handles its own success callback
 442                                         if ( !jsonp ) {
 443                                                 jQuery.ajax.handleSuccess( s, xhr, status, data );
 444                                         }
 445                                 } else {
 446                                         jQuery.ajax.handleError( s, xhr, status, errMsg );
 447                                 }
 448
 449                                 // Fire the complete handlers
 450                                 if ( !jsonp ) {
 451                                         jQuery.ajax.handleComplete( s, xhr, status, data );
 452                                 }
 453
 454                                 if ( isTimeout === "timeout" ) {
 455                                         xhr.abort();
 456                                 }
 457
 458                                 // Stop memory leaks
 459                                 if ( s.async ) {
 460                                         xhr = null;
 461                                 }
 462                         }
 463                 };
 464
 465                 // Override the abort handler, if we can (IE doesn't allow it, but that's OK)
 466                 // Opera doesn't fire onreadystatechange at all on abort
 467                 try {
 468                         var oldAbort = xhr.abort;
 469                         xhr.abort = function() {
 470                                 if ( xhr ) {
 471                                         oldAbort.call( xhr );
 472                                 }
 473
 474                                 onreadystatechange( "abort" );
 475                         };
 476                 } catch( abortError ) {}
 477
 478                 // Timeout checker
 479                 if ( s.async && s.timeout > 0 ) {
 480                         setTimeout(function() {
 481                                 // Check to see if the request is still happening
 482                                 if ( xhr && !requestDone ) {
 483                                         onreadystatechange( "timeout" );
 484                                 }
 485                         }, s.timeout);
 486                 }
 487
 488                 // Send the data
 489                 try {
 490                         xhr.send( (type !== "GET" && s.data) || null );
 491
 492                 } catch( sendError ) {
 493                         jQuery.ajax.handleError( s, xhr, null, e );
 494
 495                         // Fire the complete handlers
 496                         jQuery.ajax.handleComplete( s, xhr, status, data );
 497                 }
 498
 499                 // firefox 1.5 doesn't fire statechange for sync requests
 500                 if ( !s.async ) {
 501                         onreadystatechange();
 502                 }
 503
 504                 // return XMLHttpRequest to allow aborting the request etc.
 505                 return xhr;
 506         },
 507
 508         // Serialize an array of form elements or a set of
 509         // key/values into a query string
 510         param: function( a, traditional ) {
 511                 var s = [], add = function( key, value ) {
 512                         // If value is a function, invoke it and return its value
 513                         value = jQuery.isFunction(value) ? value() : value;
 514                         s[ s.length ] = encodeURIComponent(key) + "=" + encodeURIComponent(value);
 515                 };
 516
 517                 // Set traditional to true for jQuery <= 1.3.2 behavior.
 518                 if ( traditional === undefined ) {
 519                         traditional = jQuery.ajaxSettings.traditional;
 520                 }
 521
 522                 // If an array was passed in, assume that it is an array of form elements.
 523                 if ( jQuery.isArray(a) || a.jquery ) {
 524                         // Serialize the form elements
 525                         jQuery.each( a, function() {
 526                                 add( this.name, this.value );
 527                         });
 528
 529                 } else {
 530                         // If traditional, encode the "old" way (the way 1.3.2 or older
 531                         // did it), otherwise encode params recursively.
 532                         for ( var prefix in a ) {
 533                                 buildParams( prefix, a[prefix], traditional, add );
 534                         }
 535                 }
 536
 537                 // Return the resulting serialization
 538                 return s.join("&").replace(r20, "+");
 539         }
 540 });
 541
 542 function buildParams( prefix, obj, traditional, add ) {
 543         if ( jQuery.isArray(obj) ) {
 544                 // Serialize array item.
 545                 jQuery.each( obj, function( i, v ) {
 546                         if ( traditional || rbracket.test( prefix ) ) {
 547                                 // Treat each array item as a scalar.
 548                                 add( prefix, v );
 549
 550                         } else {
 551                                 // If array item is non-scalar (array or object), encode its
 552                                 // numeric index to resolve deserialization ambiguity issues.
 553                                 // Note that rack (as of 1.0.0) can't currently deserialize
 554                                 // nested arrays properly, and attempting to do so may cause
 555                                 // a server error. Possible fixes are to modify rack's
 556                                 // deserialization algorithm or to provide an option or flag
 557                                 // to force array serialization to be shallow.
 558                                 buildParams( prefix + "[" + ( typeof v === "object" || jQuery.isArray(v) ? i : "" ) + "]", v, traditional, add );
 559                         }
 560                 });
 561
 562         } else if ( !traditional && obj != null && typeof obj === "object" ) {
 563                 // Serialize object item.
 564                 jQuery.each( obj, function( k, v ) {
 565                         buildParams( prefix + "[" + k + "]", v, traditional, add );
 566                 });
 567
 568         } else {
 569                 // Serialize scalar item.
 570                 add( prefix, obj );
 571         }
 572 }
 573
 574 jQuery.extend( jQuery.ajax, {
 575
 576         // Counter for holding the number of active queries
 577         active: 0,
 578
 579         // Last-Modified header cache for next request
 580         lastModified: {},
 581         etag: {},
 582
 583         handleError: function( s, xhr, status, e ) {
 584                 // If a local callback was specified, fire it
 585                 if ( s.error ) {
 586                         s.error.call( s.context, xhr, status, e );
 587                 }
 588
 589                 // Fire the global callback
 590                 if ( s.global ) {
 591                         jQuery.ajax.triggerGlobal( s, "ajaxError", [xhr, s, e] );
 592                 }
 593         },
 594
 595         handleSuccess: function( s, xhr, status, data ) {
 596                 // If a local callback was specified, fire it and pass it the data
 597                 if ( s.success ) {
 598                         s.success.call( s.context, data, status, xhr );
 599                 }
 600
 601                 // Fire the global callback
 602                 if ( s.global ) {
 603                         jQuery.ajax.triggerGlobal( s, "ajaxSuccess", [xhr, s] );
 604                 }
 605         },
 606
 607         handleComplete: function( s, xhr, status ) {
 608                 // Process result
 609                 if ( s.complete ) {
 610                         s.complete.call( s.context, xhr, status );
 611                 }
 612
 613                 // The request was completed
 614                 if ( s.global ) {
 615                         jQuery.ajax.triggerGlobal( s, "ajaxComplete", [xhr, s] );
 616                 }
 617
 618                 // Handle the global AJAX counter
 619                 if ( s.global && jQuery.ajax.active-- === 1 ) {
 620                         jQuery.event.trigger( "ajaxStop" );
 621                 }
 622         },
 623
 624         triggerGlobal: function( s, type, args ) {
 625                 (s.context && s.context.url == null ? jQuery(s.context) : jQuery.event).trigger(type, args);
 626         },
 627
 628         // Determines if an XMLHttpRequest was successful or not
 629         httpSuccess: function( xhr ) {
 630                 try {
 631                         // IE error sometimes returns 1223 when it should be 204 so treat it as success, see #1450
 632                         return !xhr.status && location.protocol === "file:" ||
 633                                 xhr.status >= 200 && xhr.status < 300 ||
 634                                 xhr.status === 304 || xhr.status === 1223;
 635                 } catch(e) {}
 636
 637                 return false;
 638         },
 639
 640         // Determines if an XMLHttpRequest returns NotModified
 641         httpNotModified: function( xhr, url ) {
 642                 var lastModified = xhr.getResponseHeader("Last-Modified"),
 643                         etag = xhr.getResponseHeader("Etag");
 644
 645                 if ( lastModified ) {
 646                         jQuery.ajax.lastModified[url] = lastModified;
 647                 }
 648
 649                 if ( etag ) {
 650                         jQuery.ajax.etag[url] = etag;
 651                 }
 652
 653                 return xhr.status === 304;
 654         },
 655
 656         httpData: function( xhr, type, s ) {
 657                 var ct = xhr.getResponseHeader("content-type") || "",
 658                         xml = type === "xml" || !type && ct.indexOf("xml") >= 0,
 659                         data = xml ? xhr.responseXML : xhr.responseText;
 660
 661                 if ( xml && data.documentElement.nodeName === "parsererror" ) {
 662                         jQuery.error( "parsererror" );
 663                 }
 664
 665                 // Allow a pre-filtering function to sanitize the response
 666                 // s is checked to keep backwards compatibility
 667                 if ( s && s.dataFilter ) {
 668                         data = s.dataFilter( data, type );
 669                 }
 670
 671                 // The filter can actually parse the response
 672                 if ( typeof data === "string" ) {
 673                         // Get the JavaScript object, if JSON is used.
 674                         if ( type === "json" || !type && ct.indexOf("json") >= 0 ) {
 675                                 data = jQuery.parseJSON( data );
 676
 677                         // If the type is "script", eval it in global context
 678                         } else if ( type === "script" || !type && ct.indexOf("javascript") >= 0 ) {
 679                                 jQuery.globalEval( data );
 680                         }
 681                 }
 682
 683                 return data;
 684         }
 685
 686 });
 687
 688 // Does this browser support XHR requests?
 689 jQuery.support.ajax = !!jQuery.ajaxSettings.xhr();
 690
 691 // For backwards compatibility
 692 jQuery.extend( jQuery.ajax );
 693
 694 })( jQuery );