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 jQuery.fn = jQuery.prototype = {
43 init: function( selector, context ) {
46 // Handle $(""), $(null), or $(undefined)
51 // $("body"): Shortcut for quickly finding the body element
52 if ( selector === "body" && !context && document.body ) {
53 selector = document.body;
56 // Handle $(DOMElement)
57 if ( selector.nodeType ) {
58 this.context = this[0] = selector;
63 // Handle HTML strings
64 if ( typeof selector === "string" ) {
65 // Are we dealing with HTML string or an ID?
66 match = quickExpr.exec( selector );
68 // Verify a match, and that no context was specified for #id
69 if ( match && (match[1] || !context) ) {
71 // HANDLE: $(html) -> $(array)
73 selector = jQuery.clean( [ match[1] ], context );
77 elem = document.getElementById( match[2] );
80 // Handle the case where IE and Opera return items
81 // by name instead of ID
82 if ( elem.id !== match[2] ) {
83 return rootjQuery.find( selector );
86 // Otherwise, we inject the element directly into the jQuery object
91 this.context = document;
92 this.selector = selector;
96 // HANDLE: $(expr, $(...))
97 } else if ( !context || context.jquery ) {
98 return (context || rootjQuery).find( selector );
100 // HANDLE: $(expr, context)
101 // (which is just equivalent to: $(context).find(expr)
103 return jQuery( context ).find( selector );
106 // HANDLE: $(function)
107 // Shortcut for document ready
108 } else if ( jQuery.isFunction( selector ) ) {
109 return rootjQuery.ready( selector );
112 // Make sure that old selector state is passed along
113 if ( selector.selector && selector.context ) {
114 this.selector = selector.selector;
115 this.context = selector.context;
118 return this.setArray(jQuery.isArray( selector ) ?
120 jQuery.makeArray(selector));
123 // Start with an empty selector
126 // The current version of jQuery being used
129 // The default length of a jQuery object is 0
132 // The number of elements contained in the matched element set
138 return slice.call( this, 0 );
141 // Get the Nth element in the matched element set OR
142 // Get the whole matched element set as a clean array
143 get: function( num ) {
146 // Return a 'clean' array
149 // Return just the object
150 ( num < 0 ? this.slice(num)[ 0 ] : this[ num ] );
153 // Take an array of elements and push it onto the stack
154 // (returning the new matched element set)
155 pushStack: function( elems, name, selector ) {
156 // Build a new jQuery matched element set
157 var ret = jQuery( elems || null );
159 // Add the old object onto the stack (as a reference)
160 ret.prevObject = this;
162 ret.context = this.context;
164 if ( name === "find" ) {
165 ret.selector = this.selector + (this.selector ? " " : "") + selector;
167 ret.selector = this.selector + "." + name + "(" + selector + ")";
170 // Return the newly-formed element set
174 // Force the current matched set of elements to become
175 // the specified array of elements (destroying the stack in the process)
176 // You should use pushStack() in order to do this, but maintain the stack
177 setArray: function( elems ) {
178 // Resetting the length to 0, then using the native Array push
179 // is a super-fast way to populate an object with array-like properties
181 push.apply( this, elems );
186 // Execute a callback for every element in the matched set.
187 // (You can seed the arguments with an array of args, but this is
188 // only used internally.)
189 each: function( callback, args ) {
190 return jQuery.each( this, callback, args );
193 // Determine the position of an element within
194 // the matched set of elements
195 index: function( elem ) {
196 if ( !elem || typeof elem === "string" ) {
197 return jQuery.inArray( this[0],
198 // If it receives a string, the selector is used
199 // If it receives nothing, the siblings are used
200 elem ? jQuery( elem ) : this.parent().children() );
202 // Locate the position of the desired element
203 return jQuery.inArray(
204 // If it receives a jQuery object, the first element is used
205 elem.jquery ? elem[0] : elem, this );
208 is: function( selector ) {
209 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
212 // For internal use only.
213 // Behaves like an Array's method, not like a jQuery method.
219 // Give the init function the jQuery prototype for later instantiation
220 jQuery.fn.init.prototype = jQuery.fn;
222 jQuery.extend = jQuery.fn.extend = function() {
223 // copy reference to target object
224 var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options, name, src, copy;
226 // Handle a deep copy situation
227 if ( typeof target === "boolean" ) {
229 target = arguments[1] || {};
230 // skip the boolean and the target
234 // Handle case when target is a string or something (possible in deep copy)
235 if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
239 // extend jQuery itself if only one argument is passed
240 if ( length === i ) {
245 for ( ; i < length; i++ ) {
246 // Only deal with non-null/undefined values
247 if ( (options = arguments[ i ]) != null ) {
248 // Extend the base object
249 for ( name in options ) {
250 src = target[ name ];
251 copy = options[ name ];
253 // Prevent never-ending loop
254 if ( target === copy ) {
258 // Recurse if we're merging object values
259 if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
264 } else if ( jQuery.isArray(copy) ) {
266 } else if ( jQuery.isObject(copy) ) {
272 // Never move original objects, clone them
273 target[ name ] = jQuery.extend( deep, clone, copy );
275 // Don't bring in undefined values
276 } else if ( copy !== undefined ) {
277 target[ name ] = copy;
283 // Return the modified object
288 noConflict: function( deep ) {
292 window.jQuery = _jQuery;
298 // See test/unit/core.js for details concerning isFunction.
299 // Since version 1.3, DOM methods and functions like alert
300 // aren't supported. They return false on IE (#2968).
301 isFunction: function( obj ) {
302 return toString.call(obj) === "[object Function]";
305 isArray: function( obj ) {
306 return toString.call(obj) === "[object Array]";
309 isObject: function( obj ) {
310 return this.constructor.call(obj) === Object;
313 isEmptyObject: function( obj ) {
314 for ( var name in obj ) {
320 // check if an element is in a (or is an) XML document
321 isXMLDoc: function( elem ) {
322 // documentElement is verified for cases where it doesn't yet exist
323 // (such as loading iframes in IE - #4833)
324 var documentElement = (elem ? elem.ownerDocument || elem : 0).documentElement;
325 return documentElement ? documentElement.nodeName !== "HTML" : false;
328 // Evalulates a script in a global context
329 globalEval: function( data ) {
330 if ( data && rnotwhite.test(data) ) {
331 // Inspired by code by Andrea Giammarchi
332 // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
333 var head = document.getElementsByTagName("head")[0] || document.documentElement,
334 script = document.createElement("script");
336 script.type = "text/javascript";
338 if ( jQuery.support.scriptEval ) {
339 script.appendChild( document.createTextNode( data ) );
344 // Use insertBefore instead of appendChild to circumvent an IE6 bug.
345 // This arises when a base node is used (#2709).
346 head.insertBefore( script, head.firstChild );
347 head.removeChild( script );
351 nodeName: function( elem, name ) {
352 return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
355 // args is for internal usage only
356 each: function( object, callback, args ) {
358 length = object.length,
359 isObj = length === undefined || jQuery.isFunction(object);
363 for ( name in object ) {
364 if ( callback.apply( object[ name ], args ) === false ) {
369 for ( ; i < length; ) {
370 if ( callback.apply( object[ i++ ], args ) === false ) {
376 // A special, fast, case for the most common use of each
379 for ( name in object ) {
380 if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
385 for ( var value = object[0];
386 i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
393 trim: function( text ) {
394 return (text || "").replace( rtrim, "" );
397 makeArray: function( array ) {
400 if ( array != null ) {
403 // The window, strings (and functions) also have 'length'
404 if ( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval ) {
416 inArray: function( elem, array ) {
417 for ( var i = 0, length = array.length; i < length; i++ ) {
418 if ( array[ i ] === elem ) {
426 merge: function( first, second ) {
427 // We have to loop this way because IE & Opera overwrite the length
428 // expando of getElementsByTagName
429 var i = 0, elem, pos = first.length;
431 // Also, we need to make sure that the correct elements are being returned
432 // (IE returns comment nodes in a '*' query)
433 if ( !jQuery.support.getAll ) {
434 while ( (elem = second[ i++ ]) != null ) {
435 if ( elem.nodeType !== 8 ) {
436 first[ pos++ ] = elem;
441 while ( (elem = second[ i++ ]) != null ) {
442 first[ pos++ ] = elem;
449 unique: function( array ) {
450 var ret = [], done = {}, id;
453 for ( var i = 0, length = array.length; i < length; i++ ) {
454 id = jQuery.data( array[ i ] );
458 ret.push( array[ i ] );
468 grep: function( elems, callback, inv ) {
471 // Go through the array, only saving the items
472 // that pass the validator function
473 for ( var i = 0, length = elems.length; i < length; i++ ) {
474 if ( !inv !== !callback( elems[ i ], i ) ) {
475 ret.push( elems[ i ] );
482 map: function( elems, callback ) {
485 // Go through the array, translating each of the items to their
486 // new value (or values).
487 for ( var i = 0, length = elems.length; i < length; i++ ) {
488 value = callback( elems[ i ], i );
490 if ( value != null ) {
491 ret[ ret.length ] = value;
495 return ret.concat.apply( [], ret );
498 // Use of jQuery.browser is deprecated.
499 // It's included for backwards compatibility and plugins,
500 // although they should work to migrate away.
502 version: (/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/.exec(userAgent) || [0,'0'])[1],
503 safari: /webkit/.test( userAgent ),
504 opera: /opera/.test( userAgent ),
505 msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
506 mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
510 // All jQuery objects should point back to these
511 rootjQuery = jQuery(document);
513 function evalScript( i, elem ) {
521 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
524 if ( elem.parentNode ) {
525 elem.parentNode.removeChild( elem );
530 return (new Date).getTime();