-
- head.appendChild(script);
-
- // We handle everything using the script element injection
- return undefined;
- }
-
- var requestDone = false;
-
- // Create the request object; Microsoft failed to properly
- // implement the XMLHttpRequest in IE7, so we use the ActiveXObject when it is available
- var xhr = window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
-
- // Open the socket
- // Passing null username, generates a login popup on Opera (#2865)
- if( s.username )
- xhr.open(type, s.url, s.async, s.username, s.password);
- else
- xhr.open(type, s.url, s.async);
-
- // Need an extra try/catch for cross domain requests in Firefox 3
- try {
- // Set the correct header, if data is being sent
- if ( s.data )
- xhr.setRequestHeader("Content-Type", s.contentType);
-
- // Set the If-Modified-Since header, if ifModified mode.
- if ( s.ifModified )
- xhr.setRequestHeader("If-Modified-Since",
- jQuery.lastModified[s.url] || "Thu, 01 Jan 1970 00:00:00 GMT" );
-
- // Set header so the called script knows that it's an XMLHttpRequest
- xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
-
- // Set the Accepts header for the server, depending on the dataType
- xhr.setRequestHeader("Accept", s.dataType && s.accepts[ s.dataType ] ?
- s.accepts[ s.dataType ] + ", */*" :
- s.accepts._default );
- } catch(e){}
-
- // Allow custom headers/mimetypes
- if ( s.beforeSend && s.beforeSend(xhr, s) === false ) {
- // cleanup active request counter
- s.global && jQuery.active--;
- // close opended socket
- xhr.abort();
- return false;