+ error: function( msg ) {
+ throw msg;
+ },
+
+ parseJSON: function( data ) {
+ if ( typeof data !== "string" || !data ) {
+ return null;
+ }
+
+ // Make sure leading/trailing whitespace is removed (IE can't handle it)
+ data = jQuery.trim( data );
+
+ // Make sure the incoming data is actual JSON
+ // Logic borrowed from http://json.org/json2.js
+ if ( rvalidchars.test(data.replace(rvalidescape, "@")
+ .replace(rvalidtokens, "]")
+ .replace(rvalidbraces, "")) ) {
+
+ // Try to use the native JSON parser first
+ return window.JSON && window.JSON.parse ?
+ window.JSON.parse( data ) :
+ (new Function("return " + data))();
+
+ } else {
+ jQuery.error( "Invalid JSON: " + data );
+ }
+ },
+
+ // Cross-browser xml parsing
+ // (xml & tmp used internally)
+ parseXML: function( data , xml , tmp ) {
+
+ if ( window.DOMParser ) { // Standard
+ tmp = new DOMParser();
+ xml = tmp.parseFromString( data , "text/xml" );
+ } else { // IE
+ xml = new ActiveXObject( "Microsoft.XMLDOM" );
+ xml.async = "false";
+ xml.loadXML( data );
+ }
+
+ tmp = xml.documentElement;
+
+ if ( ! tmp || ! tmp.nodeName || tmp.nodeName === "parsererror" ) {
+ jQuery.error( "Invalid XML: " + data );
+ }
+
+ return xml;
+ },
+