1 // Define a local copy of jQuery
2 var jQuery = function( selector, context ) {
3 // The jQuery object is actually just the init constructor 'enhanced'
4 return arguments.length === 0 ?
6 new jQuery.fn.init( selector, context );
9 // Map over jQuery in case of overwrite
10 _jQuery = window.jQuery,
12 // Map over the $ in case of overwrite
15 // Use the correct document accordingly with window argument (sandbox)
16 document = window.document,
18 // A central reference to the root jQuery(document)
21 // A simple way to check for HTML strings or ID strings
22 // (both of which we optimize for)
23 quickExpr = /^[^<]*(<[\w\W]+>)[^>]*$|^#([\w-]+)$/,
25 // Is it a simple selector
26 isSimple = /^.[^:#\[\.,]*$/,
28 // Check if a string has a non-whitespace character in it
31 // Used for trimming whitespace
34 // Keep a UserAgent string for use with jQuery.browser
35 userAgent = navigator.userAgent.toLowerCase(),
37 // Save a reference to some core methods
38 toString = Object.prototype.toString,
39 push = Array.prototype.push,
40 slice = Array.prototype.slice;
42 // Expose jQuery to the global object
43 window.jQuery = window.$ = jQuery;
45 jQuery.fn = jQuery.prototype = {
46 init: function( selector, context ) {
49 // Handle $(""), $(null), or $(undefined)
54 // Handle $(DOMElement)
55 if ( selector.nodeType ) {
56 this.context = this[0] = selector;
61 // Handle HTML strings
62 if ( typeof selector === "string" ) {
63 // Are we dealing with HTML string or an ID?
64 match = quickExpr.exec( selector );
66 // Verify a match, and that no context was specified for #id
67 if ( match && (match[1] || !context) ) {
69 // HANDLE: $(html) -> $(array)
71 selector = jQuery.clean( [ match[1] ], context );
75 elem = document.getElementById( match[2] );
78 // Handle the case where IE and Opera return items
79 // by name instead of ID
80 if ( elem.id !== match[2] ) {
81 return rootjQuery.find( selector );
84 // Otherwise, we inject the element directly into the jQuery object
89 this.context = document;
90 this.selector = selector;
94 // HANDLE: $(expr, $(...))
95 } else if ( !context || context.jquery ) {
96 return (context || rootjQuery).find( selector );
98 // HANDLE: $(expr, context)
99 // (which is just equivalent to: $(context).find(expr)
101 return jQuery( context ).find( selector );
104 // HANDLE: $(function)
105 // Shortcut for document ready
106 } else if ( jQuery.isFunction( selector ) ) {
107 return rootjQuery.ready( selector );
110 // Make sure that old selector state is passed along
111 if ( selector.selector && selector.context ) {
112 this.selector = selector.selector;
113 this.context = selector.context;
116 return this.setArray(jQuery.isArray( selector ) ?
118 jQuery.makeArray(selector));
121 // Start with an empty selector
124 // The current version of jQuery being used
127 // The default length of a jQuery object is 0
130 // The number of elements contained in the matched element set
136 return slice.call( this, 0 );
139 // Get the Nth element in the matched element set OR
140 // Get the whole matched element set as a clean array
141 get: function( num ) {
144 // Return a 'clean' array
147 // Return just the object
148 ( num < 0 ? this.slice(num)[ 0 ] : this[ num ] );
151 // Take an array of elements and push it onto the stack
152 // (returning the new matched element set)
153 pushStack: function( elems, name, selector ) {
154 // Build a new jQuery matched element set
155 var ret = jQuery( elems || null );
157 // Add the old object onto the stack (as a reference)
158 ret.prevObject = this;
160 ret.context = this.context;
162 if ( name === "find" ) {
163 ret.selector = this.selector + (this.selector ? " " : "") + selector;
165 ret.selector = this.selector + "." + name + "(" + selector + ")";
168 // Return the newly-formed element set
172 // Force the current matched set of elements to become
173 // the specified array of elements (destroying the stack in the process)
174 // You should use pushStack() in order to do this, but maintain the stack
175 setArray: function( elems ) {
176 // Resetting the length to 0, then using the native Array push
177 // is a super-fast way to populate an object with array-like properties
179 push.apply( this, elems );
184 // Execute a callback for every element in the matched set.
185 // (You can seed the arguments with an array of args, but this is
186 // only used internally.)
187 each: function( callback, args ) {
188 return jQuery.each( this, callback, args );
191 // Determine the position of an element within
192 // the matched set of elements
193 index: function( elem ) {
194 if ( !elem || typeof elem === "string" ) {
195 return jQuery.inArray( this[0],
196 // If it receives a string, the selector is used
197 // If it receives nothing, the siblings are used
198 elem ? jQuery( elem ) : this.parent().children() );
200 // Locate the position of the desired element
201 return jQuery.inArray(
202 // If it receives a jQuery object, the first element is used
203 elem.jquery ? elem[0] : elem, this );
206 is: function( selector ) {
207 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
210 // For internal use only.
211 // Behaves like an Array's method, not like a jQuery method.
217 // Give the init function the jQuery prototype for later instantiation
218 jQuery.fn.init.prototype = jQuery.fn;
220 jQuery.extend = jQuery.fn.extend = function() {
221 // copy reference to target object
222 var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options, name, src, copy;
224 // Handle a deep copy situation
225 if ( typeof target === "boolean" ) {
227 target = arguments[1] || {};
228 // skip the boolean and the target
232 // Handle case when target is a string or something (possible in deep copy)
233 if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
237 // extend jQuery itself if only one argument is passed
238 if ( length === i ) {
243 for ( ; i < length; i++ ) {
244 // Only deal with non-null/undefined values
245 if ( (options = arguments[ i ]) != null ) {
246 // Extend the base object
247 for ( name in options ) {
248 src = target[ name ];
249 copy = options[ name ];
251 // Prevent never-ending loop
252 if ( target === copy ) {
256 // Recurse if we're merging object values
257 if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
262 } else if ( jQuery.isArray(copy) ) {
264 } else if ( jQuery.isObject(copy) ) {
270 // Never move original objects, clone them
271 target[ name ] = jQuery.extend( deep, clone, copy );
273 // Don't bring in undefined values
274 } else if ( copy !== undefined ) {
275 target[ name ] = copy;
281 // Return the modified object
286 noConflict: function( deep ) {
290 window.jQuery = _jQuery;
296 // See test/unit/core.js for details concerning isFunction.
297 // Since version 1.3, DOM methods and functions like alert
298 // aren't supported. They return false on IE (#2968).
299 isFunction: function( obj ) {
300 return toString.call(obj) === "[object Function]";
303 isArray: function( obj ) {
304 return toString.call(obj) === "[object Array]";
307 isObject: function( obj ) {
308 return this.constructor.call(obj) === Object;
311 isEmptyObject: function( obj ) {
312 for ( var name in obj ) {
318 // check if an element is in a (or is an) XML document
319 isXMLDoc: function( elem ) {
320 // documentElement is verified for cases where it doesn't yet exist
321 // (such as loading iframes in IE - #4833)
322 return ((elem.ownerDocument || elem).documentElement || 0).nodeName !== "HTML";
325 // Evalulates a script in a global context
326 globalEval: function( data ) {
327 if ( data && rnotwhite.test(data) ) {
328 // Inspired by code by Andrea Giammarchi
329 // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
330 var head = document.getElementsByTagName("head")[0] || document.documentElement,
331 script = document.createElement("script");
333 script.type = "text/javascript";
335 if ( jQuery.support.scriptEval ) {
336 script.appendChild( document.createTextNode( data ) );
341 // Use insertBefore instead of appendChild to circumvent an IE6 bug.
342 // This arises when a base node is used (#2709).
343 head.insertBefore( script, head.firstChild );
344 head.removeChild( script );
348 nodeName: function( elem, name ) {
349 return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
352 // args is for internal usage only
353 each: function( object, callback, args ) {
355 length = object.length,
356 isObj = length === undefined || jQuery.isFunction(object);
360 for ( name in object ) {
361 if ( callback.apply( object[ name ], args ) === false ) {
366 for ( ; i < length; ) {
367 if ( callback.apply( object[ i++ ], args ) === false ) {
373 // A special, fast, case for the most common use of each
376 for ( name in object ) {
377 if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
382 for ( var value = object[0];
383 i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
390 trim: function( text ) {
391 return (text || "").replace( rtrim, "" );
394 makeArray: function( array ) {
397 if ( array != null ) {
400 // The window, strings (and functions) also have 'length'
401 if ( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval ) {
413 inArray: function( elem, array ) {
414 for ( var i = 0, length = array.length; i < length; i++ ) {
415 if ( array[ i ] === elem ) {
423 merge: function( first, second ) {
424 // We have to loop this way because IE & Opera overwrite the length
425 // expando of getElementsByTagName
426 var i = 0, elem, pos = first.length;
428 // Also, we need to make sure that the correct elements are being returned
429 // (IE returns comment nodes in a '*' query)
430 if ( !jQuery.support.getAll ) {
431 while ( (elem = second[ i++ ]) != null ) {
432 if ( elem.nodeType !== 8 ) {
433 first[ pos++ ] = elem;
438 while ( (elem = second[ i++ ]) != null ) {
439 first[ pos++ ] = elem;
446 unique: function( array ) {
447 var ret = [], done = {}, id;
450 for ( var i = 0, length = array.length; i < length; i++ ) {
451 id = jQuery.data( array[ i ] );
455 ret.push( array[ i ] );
465 grep: function( elems, callback, inv ) {
468 // Go through the array, only saving the items
469 // that pass the validator function
470 for ( var i = 0, length = elems.length; i < length; i++ ) {
471 if ( !inv !== !callback( elems[ i ], i ) ) {
472 ret.push( elems[ i ] );
479 map: function( elems, callback ) {
482 // Go through the array, translating each of the items to their
483 // new value (or values).
484 for ( var i = 0, length = elems.length; i < length; i++ ) {
485 value = callback( elems[ i ], i );
487 if ( value != null ) {
488 ret[ ret.length ] = value;
492 return ret.concat.apply( [], ret );
495 // Use of jQuery.browser is deprecated.
496 // It's included for backwards compatibility and plugins,
497 // although they should work to migrate away.
499 version: (/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/.exec(userAgent) || [0,'0'])[1],
500 safari: /webkit/.test( userAgent ),
501 opera: /opera/.test( userAgent ),
502 msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
503 mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
507 // All jQuery objects should point back to these
508 rootjQuery = jQuery(document);
510 function evalScript( i, elem ) {
518 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
521 if ( elem.parentNode ) {
522 elem.parentNode.removeChild( elem );
527 return (new Date).getTime();