526 		var key;
527 		for ( key in obj ) {}
529 		return key === undefined || hasOwn.call( obj, key );
740 		var value, key, ret = [],
758 			for ( key in elems ) {
759 				value = callback( elems[ key ], key, arg );
803 	access: function( elems, key, value, exec, fn, pass ) {  argument
807 		if ( typeof key === "object" ) {
808 			for ( var k in key ) {
809 				jQuery.access( elems, k, key[k], exec, fn, value );
820 				fn( elems[i], key, exec ? value.call( elems[i], i, fn( elems[i], key ) ) : value, pass );
827 		return length ? fn( elems[0], key ) : undefined;
1597 	data: function( key, value ) {  argument
1600 		if ( typeof key === "undefined" ) {
1620 		} else if ( typeof key === "object" ) {
1622 				jQuery.data( this, key );
1626 		var parts = key.split(".");
1634 				data = jQuery.data( this[0], key );
1635 				data = dataAttr( this[0], key, data );
1648 				jQuery.data( this, key, value );
1654 	removeData: function( key ) {  argument
1656 			jQuery.removeData( this, key );
1661 function dataAttr( elem, key, data ) {  argument
1665 		var name = "data-" + key.replace( rmultiDash, "$1-$2" ).toLowerCase();
1680 			jQuery.data( elem, key, data );
1743 			var key = type + "mark",
1744 				count = force ? 0 : ( (jQuery.data( elem, key, undefined, true) || 1 ) - 1 );
1746 				jQuery.data( elem, key, count, true );
1748 				jQuery.removeData( elem, key, true );
3401 			for ( var key in type ) {
3402 				this[ name ](key, data, type[key], fn);
3439 			for ( var key in type ) {
3440 				this.unbind(key, type[key]);
3522 			for ( var key in types ) {
3523 				context[ name ]( key, data, types[key], selector );
7009 				getResponseHeader: function( key ) {  argument
7018 						match = responseHeaders[ key.toLowerCase() ];
7326 			add = function( key, value ) {  argument
7329 				s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
7482 		key,
7502 			for( key in s.converters ) {
7503 				if( typeof key === "string" ) {
7504 					converters[ key.toLowerCase() ] = s.converters[ key ];
7730 		for ( var key in xhrCallbacks ) {
7731 			xhrCallbacks[ key ]( 0, 1 );