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 = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
25 // Is it a simple selector
26 isSimple = /^.[^:#\[\.,]*$/,
28 // Keep a UserAgent string for use with jQuery.browser
29 userAgent = navigator.userAgent.toLowerCase(),
31 // Save a reference to the core toString method
32 toString = Object.prototype.toString;
34 // Expose jQuery to the global object
35 window.jQuery = window.$ = jQuery;
37 jQuery.fn = jQuery.prototype = {
38 init: function( selector, context ) {
41 // Handle $(""), $(null), or $(undefined)
42 if ( !selector ) return this;
44 // Handle $(DOMElement)
45 if ( selector.nodeType ) {
46 this.context = this[0] = selector;
51 // Handle HTML strings
52 if ( typeof selector === "string" ) {
53 // Are we dealing with HTML string or an ID?
54 match = quickExpr.exec( selector );
56 // Verify a match, and that no context was specified for #id
57 if ( match && (match[1] || !context) ) {
59 // HANDLE: $(html) -> $(array)
61 selector = jQuery.clean( [ match[1] ], context );
65 elem = document.getElementById( match[3] );
68 // Handle the case where IE and Opera return items
69 // by name instead of ID
70 if ( elem.id !== match[3] ) return rootjQuery.find( selector );
72 // Otherwise, we inject the element directly into the jQuery object
77 this.context = document;
78 this.selector = selector;
82 // HANDLE: $(expr, $(...))
83 } else if ( !context || context.jquery ) {
84 return (context || rootjQuery).find( selector );
86 // HANDLE: $(expr, context)
87 // (which is just equivalent to: $(context).find(expr)
89 return jQuery( context ).find( selector );
92 // HANDLE: $(function)
93 // Shortcut for document ready
94 } else if ( jQuery.isFunction( selector ) ) {
95 return rootjQuery.ready( selector );
98 // Make sure that old selector state is passed along
99 if ( selector.selector && selector.context ) {
100 this.selector = selector.selector;
101 this.context = selector.context;
104 return this.setArray(jQuery.isArray( selector ) ?
106 jQuery.makeArray(selector));
109 // Start with an empty selector
112 // The current version of jQuery being used
115 // The default length of a jQuery object is 0
118 // The number of elements contained in the matched element set
123 toArray: Array.prototype.slice,
125 // Get the Nth element in the matched element set OR
126 // Get the whole matched element set as a clean array
127 get: function( num ) {
130 // Return a 'clean' array
133 // Return just the object
134 ( num < 0 ? this.toArray(num)[ 0 ] : this[ num ] );
137 // Take an array of elements and push it onto the stack
138 // (returning the new matched element set)
139 pushStack: function( elems, name, selector ) {
140 // Build a new jQuery matched element set
141 var ret = jQuery( elems || null );
143 // Add the old object onto the stack (as a reference)
144 ret.prevObject = this;
146 ret.context = this.context;
148 if ( name === "find" ) {
149 ret.selector = this.selector + (this.selector ? " " : "") + selector;
151 ret.selector = this.selector + "." + name + "(" + selector + ")";
154 // Return the newly-formed element set
158 // Force the current matched set of elements to become
159 // the specified array of elements (destroying the stack in the process)
160 // You should use pushStack() in order to do this, but maintain the stack
161 setArray: function( elems ) {
162 // Resetting the length to 0, then using the native Array push
163 // is a super-fast way to populate an object with array-like properties
165 Array.prototype.push.apply( this, elems );
170 // Execute a callback for every element in the matched set.
171 // (You can seed the arguments with an array of args, but this is
172 // only used internally.)
173 each: function( callback, args ) {
174 return jQuery.each( this, callback, args );
177 // Determine the position of an element within
178 // the matched set of elements
179 index: function( elem ) {
180 if ( !elem || typeof elem === "string" ) {
181 return jQuery.inArray( this[0],
182 // If it receives a string, the selector is used
183 // If it receives nothing, the siblings are used
184 elem ? jQuery( elem ) : this.parent().children() );
186 // Locate the position of the desired element
187 return jQuery.inArray(
188 // If it receives a jQuery object, the first element is used
189 elem.jquery ? elem[0] : elem, this );
192 is: function( selector ) {
193 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
196 // For internal use only.
197 // Behaves like an Array's method, not like a jQuery method.
203 // Give the init function the jQuery prototype for later instantiation
204 jQuery.fn.init.prototype = jQuery.fn;
206 jQuery.extend = jQuery.fn.extend = function() {
207 // copy reference to target object
208 var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options, name, src, copy;
210 // Handle a deep copy situation
211 if ( typeof target === "boolean" ) {
213 target = arguments[1] || {};
214 // skip the boolean and the target
218 // Handle case when target is a string or something (possible in deep copy)
219 if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
223 // extend jQuery itself if only one argument is passed
224 if ( length === i ) {
229 for ( ; i < length; i++ ) {
230 // Only deal with non-null/undefined values
231 if ( (options = arguments[ i ]) != null ) {
232 // Extend the base object
233 for ( name in options ) {
234 src = target[ name ];
235 copy = options[ name ];
237 // Prevent never-ending loop
238 if ( target === copy ) {
242 // Recurse if we're merging object values
243 if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
246 if( src ) clone = src;
247 else if( jQuery.isArray(copy) ) clone = [ ];
248 else if( jQuery.isObject(copy) ) clone = { };
251 // Never move original objects, clone them
252 target[ name ] = jQuery.extend( deep, clone, copy );
254 // Don't bring in undefined values
255 } else if ( copy !== undefined ) {
256 target[ name ] = copy;
262 // Return the modified object
267 noConflict: function( deep ) {
271 window.jQuery = _jQuery;
277 // See test/unit/core.js for details concerning isFunction.
278 // Since version 1.3, DOM methods and functions like alert
279 // aren't supported. They return false on IE (#2968).
280 isFunction: function( obj ) {
281 return toString.call(obj) === "[object Function]";
284 isArray: function( obj ) {
285 return toString.call(obj) === "[object Array]";
288 isObject: function( obj ) {
289 return this.constructor.call(obj) === Object;
292 isEmptyObject: function( obj ) {
298 // check if an element is in a (or is an) XML document
299 isXMLDoc: function( elem ) {
300 return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
301 !!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";
304 // Evalulates a script in a global context
305 globalEval: function( data ) {
306 if ( data && /\S/.test(data) ) {
307 // Inspired by code by Andrea Giammarchi
308 // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
309 var head = document.getElementsByTagName("head")[0] || document.documentElement,
310 script = document.createElement("script");
312 script.type = "text/javascript";
313 if ( jQuery.support.scriptEval ) {
314 script.appendChild( document.createTextNode( data ) );
319 // Use insertBefore instead of appendChild to circumvent an IE6 bug.
320 // This arises when a base node is used (#2709).
321 head.insertBefore( script, head.firstChild );
322 head.removeChild( script );
326 nodeName: function( elem, name ) {
327 return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
330 // args is for internal usage only
331 each: function( object, callback, args ) {
333 length = object.length,
334 isObj = length === undefined || jQuery.isFunction(object);
338 for ( name in object ) {
339 if ( callback.apply( object[ name ], args ) === false ) {
344 for ( ; i < length; ) {
345 if ( callback.apply( object[ i++ ], args ) === false ) {
351 // A special, fast, case for the most common use of each
354 for ( name in object ) {
355 if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
360 for ( var value = object[0];
361 i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
368 trim: function( text ) {
369 return (text || "").replace( /^\s+|\s+$/g, "" );
372 makeArray: function( array ) {
375 if ( array != null ) {
378 // The window, strings (and functions) also have 'length'
379 if ( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval ) {
391 inArray: function( elem, array ) {
392 for ( var i = 0, length = array.length; i < length; i++ ) {
393 if ( array[ i ] === elem ) {
401 merge: function( first, second ) {
402 // We have to loop this way because IE & Opera overwrite the length
403 // expando of getElementsByTagName
404 var i = 0, elem, pos = first.length;
406 // Also, we need to make sure that the correct elements are being returned
407 // (IE returns comment nodes in a '*' query)
408 if ( !jQuery.support.getAll ) {
409 while ( (elem = second[ i++ ]) != null ) {
410 if ( elem.nodeType !== 8 ) {
411 first[ pos++ ] = elem;
416 while ( (elem = second[ i++ ]) != null ) {
417 first[ pos++ ] = elem;
424 unique: function( array ) {
425 var ret = [], done = {}, id;
428 for ( var i = 0, length = array.length; i < length; i++ ) {
429 id = jQuery.data( array[ i ] );
433 ret.push( array[ i ] );
443 grep: function( elems, callback, inv ) {
446 // Go through the array, only saving the items
447 // that pass the validator function
448 for ( var i = 0, length = elems.length; i < length; i++ ) {
449 if ( !inv !== !callback( elems[ i ], i ) ) {
450 ret.push( elems[ i ] );
457 map: function( elems, callback ) {
460 // Go through the array, translating each of the items to their
461 // new value (or values).
462 for ( var i = 0, length = elems.length; i < length; i++ ) {
463 value = callback( elems[ i ], i );
465 if ( value != null ) {
466 ret[ ret.length ] = value;
470 return ret.concat.apply( [], ret );
473 // Use of jQuery.browser is deprecated.
474 // It's included for backwards compatibility and plugins,
475 // although they should work to migrate away.
477 version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
478 safari: /webkit/.test( userAgent ),
479 opera: /opera/.test( userAgent ),
480 msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
481 mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
485 // All jQuery objects should point back to these
486 rootjQuery = jQuery(document);
488 function evalScript( i, elem ) {
496 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
499 if ( elem.parentNode ) {
500 elem.parentNode.removeChild( elem );
505 return (new Date).getTime();