lastModified[ cacheURL ] );
}
if ( jQuery.etag[ cacheURL ] ) {
jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
}
}

// Set the correct header, if data is being sent
if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
jqXHR.setRequestHeader( "Content-Type", s.contentType );
}

// Set the Accepts header for the server, depending on the dataType
jqXHR.setRequestHeader(
"Accept",
s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
s.accepts[ "*" ]
);

// Check for headers option
for ( i in s.headers ) {
jqXHR.setRequestHeader( i, s.headers[ i ] );
}

// Allow custom headers/mimetypes and early abort
if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
// Abort if not done already and return
return jqXHR.abort();
}

// aborting is no longer a cancellation
strAbort = "abort";

// Install callbacks on deferreds
for ( i in { success: 1, error: 1, complete: 1 } ) {
jqXHR[ i ]( s[ i ] );
}

// Get transport
transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );

// If no transport, we auto-abort
if ( !transport ) {
done( -1, "No Transport" );
} else {
jqXHR.readyState = 1;

// Send global event
if ( fireGlobals ) {
globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
}
// Timeout
if ( s.async && s.timeout > 0 ) {
timeoutTimer = setTimeout(function() {
jqXHR.abort("timeout");
}, s.timeout );
}

try {
state = 1;
transport.send( requestHeaders, done );
} catch ( e ) {
// Propagate exception as error if not done
if ( state < 2 ) {
done( -1, e );
// Simply rethrow otherwise
} else {
throw e;
}
}
}

// Callback for when everything is done
function done( status, nativeStatusText, responses, headers ) {
var isSuccess, success, error, response, modified,
statusText = nativeStatusText;

// Called once
if ( state === 2 ) {
return;
}

// State is "done" now
state = 2;

// Clear timeout if it exists
if ( timeoutTimer ) {
clearTimeout( timeoutTimer );
}

// Dereference transport for early garbage collection
// (no matter how long the jqXHR object will be used)
transport = undefined;

// Cache response headers
responseHeadersString = headers || "";

// Set readyState
jqXHR.readyState = status > 0 ? 4 : 0;

// Get response data
if ( responses ) {
response = ajaxHandleResponses( s, jqXHR, responses );
}

// If successful, handle type chaining
if ( status >= 200 && status < 300 || status === 304 ) {

// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
if ( s.ifModified ) {
modified = jqXHR.getResponseHeader("Last-Modified");
if ( modified ) {
jQuery.lastModified[ cacheURL ] = modified;
}
modified = jqXHR.getResponseHeader("etag");
if ( modified ) {
jQuery.etag[ cacheURL ] = modified;
}
}

// if no content
if ( status === 204 ) {
isSuccess = true;
statusText = "nocontent";

// if not modified
} else if ( status === 304 ) {
isSuccess = true;
statusText = "notmodified";

// If we have data, let's convert it
} else {
isSuccess = ajaxConvert( s, response );
statusText = isSuccess.state;
success = isSuccess.data;
error = isSuccess.error;
isSuccess = !error;
}
} else {
// We extract error from statusText
// then normalize statusText and status for non-aborts
error = statusText;
if ( status || !statusText ) {
statusText = "error";
if ( status < 0 ) {
status = 0;
}
}
}

// Set data for the fake xhr object
jqXHR.status = status;
jqXHR.statusText = ( nativeStatusText || statusText ) + "";

// Success/Error
if ( isSuccess ) {
deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
} else {
deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
}

// Status-dependent callbacks
jqXHR.statusCode( statusCode );
statusCode = undefined;

if ( fireGlobals ) {
globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
[ jqXHR, s, isSuccess ? success : error ] );
}

// Complete
completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );

if ( fireGlobals ) {
globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
// Handle the global AJAX counter
if ( !( --jQuery.active ) ) {
jQuery.event.trigger("ajaxStop");
}
}
}

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" );
}
});

/* Handles responses to an ajax request:
* - sets all responseXXX fields accordingly
* - finds the right dataType (mediates between content-type and expected dataType)
* - returns the corresponding response
*/
function ajaxHandleResponses( s, jqXHR, responses ) {
var firstDataType, ct, finalDataType, type,
contents = s.contents,
dataTypes = s.dataTypes,
responseFields = s.responseFields;

// Fill responseXXX fields
for ( type in responseFields ) {
if ( type in responses ) {
jqXHR[ responseFields[type] ] = responses[ type ];
}
}

// Remove auto dataType and get content-type in the process
while( dataTypes[ 0 ] === "*" ) {
dataTypes.shift();
if ( ct === undefined ) {
ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
}
}

// Check if we're dealing with a known content-type
if ( ct ) {
for ( type in contents ) {
if ( contents[ type ] && contents[ type ].test( ct ) ) {
dataTypes.unshift( type );
break;
}
}
}

// Check to see if we have a response for the expected dataType
if ( dataTypes[ 0 ] in responses ) {
finalDataType = dataTypes[ 0 ];
} else {
// Try convertible dataTypes