+ },
+
+ /**
+ * A common wrapper for making XMLHttpRequests
+ */
+ ajax: function( type, url, data, ret ) {
+ // If only a single argument was passed in,
+ // assume that it is a object of key/value pairs
+ if ( !url ) {
+ ret = type.complete;
+ var success = type.success;
+ var error = type.error;
+ data = type.data;
+ url = type.url;
+ type = type.type;
+ }
+
+ // Watch for a new set of requests
+ if ( ! jQuery.active++ )
+ jQuery.event.trigger( "ajaxStart" );
+
+ // Create the request object
+ var xml = new XMLHttpRequest();
+
+ // Open the socket
+ xml.open(type || "GET", url, true);
+
+ // Set the correct header, if data is being sent
+ if ( data )
+ xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+
+ // Set header so calling script knows that it's an XMLHttpRequest
+ xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
+
+ // Make sure the browser sends the right content length
+ if ( xml.overrideMimeType )
+ xml.setRequestHeader("Connection", "close");
+
+ // Wait for a response to come back
+ xml.onreadystatechange = function(){
+ // The transfer is complete and the data is available
+ if ( xml.readyState == 4 ) {
+ // Make sure that the request was successful
+ if ( jQuery.httpSuccess( xml ) ) {
+
+ // If a local callback was specified, fire it
+ if ( success ) success( xml );
+
+ // Fire the global callback
+ jQuery.event.trigger( "ajaxSuccess" );
+
+ // Otherwise, the request was not successful
+ } else {
+ // If a local callback was specified, fire it
+ if ( error ) error( xml );
+
+ // Fire the global callback
+ jQuery.event.trigger( "ajaxError" );
+ }
+
+ // The request was completed
+ jQuery.event.trigger( "ajaxComplete" );
+
+ // Handle the global AJAX counter
+ if ( ! --jQuery.active )
+ jQuery.event.trigger( "ajaxStop" );
+
+ // Process result
+ if ( ret ) ret(xml);
+ }
+ }
+
+ // Send the data
+ xml.send(data);
+ },
+
+ // Counter for holding the number of active queries
+ active: 0,
+
+ // Determines if an XMLHttpRequest was successful or not
+ httpSuccess: function(r) {
+ try {
+ return r.status ?
+ ( r.status >= 200 && r.status < 300 ) || r.status == 304 :
+ location.protocol == "file:";
+ } catch(e){}
+ return false;
+ },
+
+ // Get the data out of an XMLHttpRequest.
+ // Return parsed XML if content-type header is "xml" and type is "xml" or omitted,
+ // otherwise return plain text.
+ httpData: function(r,type) {
+ var ct = r.getResponseHeader("content-type");
+ var xml = ( !type || type == "xml" ) && ct && ct.indexOf("xml") >= 0;
+ return xml ? r.responseXML : r.responseText;
+ },
+
+ // Serialize an array of form elements or a set of
+ // key/values into a query string
+ param: function(a) {
+ var s = [];
+
+ // If an array was passed in, assume that it is an array
+ // of form elements
+ if ( a.constructor == Array )
+ // Serialize the form elements
+ for ( var i = 0; i < a.length; i++ )
+ s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
+
+ // Otherwise, assume that it's an object of key/value pairs
+ else
+ // Serialize the key/values
+ for ( var j in a )
+ s.push( j + "=" + encodeURIComponent( a[j] ) );
+
+ // Return the resulting serialization
+ return s.join("&");
+ }