详细说明： /*! * jQuery JavaScript Library v1.3 * http://jquery.com/ * * Copyright (c) 2009 John Resig * Dual licensed under the MIT and GPL licenses. * http://docs.jquery.com/License * * Date: 2009-01-13 12:50:31 -0500 (Tue, 13 Jan 2009) * Revision: 6104 */ (function(){ var // Will speed up references to window, and allows munging its name. window = this, // Will speed up references to undefined, and allows munging its name. undefined, // Map over jQuery in case of overwrite _jQuery = window.jQuery, // Map over the $ in case of overwrit e _$ = window.$, jQuery = window.jQuery = window.$ = function( selector, context ) { // The jQuery object is actually just the init constructor 'enhanced' return new jQuery.fn.init( selector, context ); }, // A simple way to check for HTML strings or ID strings // (both of which we optimize for) quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/, // Is it a simple selector isSimple = /^.[^:#\[\.,]*$/; jQuery.fn = jQuery.prototype = { init: function( selector, context ) { // Make sure that a selection was provided selector = selector || document; // Handle $(DOMElement) if ( selector.nodeType ) { this[0] = selector; this.length = 1; this.context = selector; return this; } // Handle HTML strings if ( typeof selector === "string" ) { // Are we dealing with HTML string or an ID? var match = quickExpr.exec( selector ); // Verify a match, and that no context was specified for #id if ( match && (match[1] || !context) ) { // HANDLE: $(html) -> $(array) if ( match[1] ) selector = jQuery.clean( [ match[1] ], context ); // HANDLE: $("#id") else { var elem = document.getElementById( match[3] ); // Make sure an element was located if ( elem ){ // Handle the case where IE and Opera return items // by name instead of ID if ( elem.id != match[3] ) return jQuery().find( selector ); // Otherwise, we inject the element directly into the jQuery object var ret = jQuery( elem ); ret.context = document; ret.selector = selector; return ret; } selector = []; } // HANDLE: $(expr, [context]) // (which is just equivalent to: $(content).find(expr) } else return jQuery( context ).find( selector ); // HANDLE: $(function) // Shortcut for document ready } else if ( jQuery.isFunction( selector ) ) return jQuery( document ).ready( selector ); // Make sure that old selector state is passed along if ( selector.selector && selector.context ) { this.selector = selector.selector; this.context = selector.context; } return this.setArray(jQuery.makeArray(selector)); }, // Start with an empty selector selector: "", // The current version of jQuery being used jquery: "1.3", // The number of elements contained in the matched element set size: function() { return this.length; }, // Get the Nth element in the matched element set OR // Get the whole matched element set as a clean array get: function( num ) { return num === undefined ? // Return a 'clean' array jQuery.makeArray( this ) : // Return just the object this[ num ]; }, // Take an array of elements and push it onto the stack // (returning the new matched element set) pushStack: function( elems, name, selector ) { // Build a new jQuery matched element set var ret = jQuery( elems ); // Add the old object onto the stack (as a reference) ret.prevObject = this; ret.context = this.context; if ( name === "find" ) ret.selector = this.selector + (this.selector ? " " : "") + selector; else if ( name ) ret.selector = this.selector + "." + name + "(" + selector + ")"; // Return the newly-formed element set return ret; }, // Force the current matched set of elements to become // the specified array of elements (destroying the stack in the process) // You should use pushStack() in order to do this, but maintain the stack setArray: function( elems ) { // Resetting the length to 0, then using the native Array push // is a super-fast way to populate an object with array-like properties this.length = 0; Array.prototype.push.apply( this, elems ); return this; }, // Execute a callback for every element in the matched set. // (You can seed the arguments with an array of args, but this is // only used internally.) each: function( callback, args ) { return jQuery.each( this, callback, args ); }, // Determine the position of an element within // the matched set of elements index: function( elem ) { // Locate the position of the desired element return jQuery.inArray( // If it receives a jQuery object, the first element is used elem && elem.jquery ? elem[0] : elem , this ); }, attr: function( name, value, type ) { var options = name; // Look for the case where we're accessing a style value if ( typeof name === "string" ) if ( value === undefined ) return this[0] && jQuery[ type || "attr" ]( this[0], name ); else { options = {}; options[ name ] = value; } // Check to see if we're setting style values return this.each(function(i){ // Set all the styles for ( name in options ) jQuery.attr( type ? this.style : this, name, jQuery.prop( this, options[ name ], type, i, name ) ); }); }, css: function( key, value ) { // ignore negative width and height values if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 ) value = undefined; return this.attr( key, value, "curCSS" ); }, text: function( text ) { if ( typeof text !== "object" && text != null ) return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) ); var ret = ""; jQuery.each( text || this, function(){ jQuery.each( this.childNodes, function(){ if ( this.nodeType != 8 ) ret += this.nodeType != 1 ? this.nodeValue : jQuery.fn.text( [ this ] ); }); }); return ret; }, wrapAll: function( html ) { if ( this[0] ) { // The elements to wrap the target around var wrap = jQuery( html, this[0].ownerDocument ).clone(); if ( this[0].parentNode ) wrap.insertBefore( this[0] ); wrap.map(function(){ var elem = this; while ( elem.firstChild ) elem = elem.firstChild; return elem; }).append(this); } return this; }, wrapInner: function( html ) { return this.each(function(){ jQuery( this ).contents().wrapAll( html ); }); }, wrap: function( html ) { return this.each(function(){ jQuery( this ).wrapAll( html ); }); }, append: function() { return this.domManip(arguments, true, function(elem){ if (this.nodeType == 1) this.appendChild( elem ); }); }, prepend: function() { return this.domManip(arguments, true, function(elem){ if (this.nodeType == 1) this.insertBefore( elem, this.firstChild ); }); }, before: function() { return this.domManip(arguments, false, function(elem){ this.parentNode.insertBefore( elem, this ); }); }, after: function() { return this.domManip(arguments, false, function(elem){ this.parentNode.insertBefore( elem, this.nextSibling ); }); }, end: function() { return this.prevObject || jQuery( [] ); }, // For internal use only. // Behaves like an Array's .push method, not like a jQuery method. push: [].push, find: function( selector ) { if ( this.length === 1 && !/,/.test(selector) ) { var ret = this.pushStack( [], "find", selector ); ret.length = 0; jQuery.find( selector, this[0], ret ); return ret; } else { var elems = jQuery.map(this, function(elem){ return jQuery.find( selector, elem ); }); return this.pushStack( /[^+>] [^+>]/.test( selector ) ? jQuery.unique( elems ) : elems, "find", selector ); } }, clone: function( events ) { // Do the clone var ret = this.map(function(){ if ( !jQuery.support.noCloneEvent && !jQuery.isXMLDoc(this) ) { // IE copies events bound via attachEvent when // using cloneNode. Calling detachEvent on the // clone will also remove the events from the orignal // In order to get around this, we use innerHTML. // Unfortunately, this means some modifications to // attributes in IE that are actually only stored // as properties will not be copied (such as the // the name attribute on an input). var clone = this.cloneNode(true), container = document.createElement("div"); container.appendChild(clone); return jQuery.clean([container.innerHTML])[0]; } else return this.cloneNode(true); }); // Need to set the expando to null on the cloned set if it exists // removeData doesn't work here, IE removes it from the original as well // this is primarily for IE but the data expando shouldn't be copied over in any browser var clone = ret.find("*").andSelf().each(function(){ if ( this[ expando ] !== undefined ) this[ expando ] = null; }); // Copy the events from the original to the clone if ( events === true ) this.find("*").andSelf().each(function(i){ if (this.nodeType == 3) return; var events = jQuery.data( this, "events" ); for ( var type in events ) for ( var handler in events[ type ] ) jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data ); }); // Return the cloned set return ret; }, filter: function( selector ) { return this.pushStack( jQuery.isFunction( selector ) && jQuery.grep(this, function(elem, i){ return selector.call( elem, i ); }) || jQuery.multiFilter( selector, jQuery.grep(this, function(elem){ return elem.nodeType === 1; }) ), "filter", selector ); }, closest: function( selector ) { var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null; return this.map(function(){ var cur = this; while ( cur && cur.ownerDocument ) { if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) return cur; cur = cur.parentNode; } }); }, not: function( selector ) { if ( typeof selector === "string" ) // test special case where just one selector is passed in if ( isSimple.test( selector ) ) return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector ); else selector = jQuery.multiFilter( selector, this ); var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType; return this.filter(function() { return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector; }); }, add: function( selector ) { return this.pushStack( jQuery.unique( jQuery.merge( this.get(), typeof selector === "string" ? jQuery( selector ) : jQuery.makeArray( selector ) ))); }, is: function( selector ) { return !!selector && jQuery.multiFilter( selector, this ).length > 0; }, hasClass: function( selector ) { return !!selector && this.is( "." + selector ); }, val: function( value ) { if ( value === undefined ) { var elem = this[0]; if ( elem ) { if( jQuery.nodeName( elem, 'option' ) ) return (elem.attributes.value || {}).specified ? elem.value : elem.text; // We need to handle select boxes special if ( jQuery.nodeName( elem, "select" ) ) { var index = elem.selectedIndex, values = [], options = elem.options, one = elem.type == "select-one"; // Nothing was selected if ( index < 0 ) return null; // Loop through all the selected options for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) { var option = options[ i ]; if ( option.selected ) { // Get the specifc value for the option value = jQuery(option).val(); // We don't need an array for one selects if ( one ) return value; // Multi-Selects return an array values.push( value ); } } return values; } // Everything else, we just grab the value return (elem.value || "").replace(/\r/g, ""); } return undefined; } if ( typeof value === "number" ) value += ''; return this.each(function(){ if ( this.nodeType != 1 ) return; if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) ) this.checked = (jQuery.inArray(this.value, value) >= 0 || jQuery.inArray(this.name, value) >= 0); else if ( jQuery.nodeName( this, "select" ) ) { var values = jQuery.makeArray(value); jQuery( "option", this ).each(function(){ this.selected = (jQuery.inArray( this.value, values ) >= 0 || jQuery.inArray( this.text, values ) >= 0); }); if ( !values.length ) this.selectedIndex = -1; } else this.value = value; }); }, html: function( value ) { return value === undefined ? (this[0] ? this[0].innerHTML : null) : this.empty().append( value ); }, replaceWith: function( value ) { return this.after( value ).remove(); }, eq: function( i ) { return this.slice( i, +i + 1 ); }, slice: function() { return this.pushStack( Array.prototype.slice.apply( this, arguments ), "slice", Array.prototype.slice.call(arguments).join(",") ); }, map: function( callback ) { return this.pushStack( jQuery.map(this, function(elem, i){ return callback.call( elem, i, elem ); })); }, andSelf: function() { return this.add( this.prevObject ); }, domManip: function( args, table, callback ) { if ( this[0] ) { var fragment = (this[0].ownerDocument || this[0]).createDocumentFragment(), scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment ), first = fragment.firstChild, extra = this.length > 1 ? fragment.cloneNode(true) : fragment; if ( first ) for ( var i = 0, l = this.length; i < l; i++ ) callback.call( root(this[i], first), i > 0 ? extra.cloneNode(true) : fragment ); if ( scripts ) jQuery.each( scripts, evalScript ); } return this; function root( elem, cur ) { return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ? (elem.getElementsByTagName("tbody")[0] || elem.appendChild(elem.ownerDocument.createElement("tbody"))) : elem; } } }; // Give the init function the jQuery prototype for later instantiation jQuery.fn.init.prototype = jQuery.fn; function evalScript( i, elem ) { if ( elem.src ) jQuery.ajax({ url: elem.src, async: false, dataType: "script" }); else jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" ); if ( elem.parentNode ) elem.parentNode.removeChild( elem ); } function now(){ return +new Date; } jQuery.extend = jQuery.fn.extend = function() { // copy reference to target object var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options; // Handle a deep copy situation if ( typeof target === "boolean" ) { deep = target; target = arguments[1] || {}; // skip the boolean and the target i = 2; } // Handle case when target is a string or something (possible in deep copy) if ( typeof target !== "object" && !jQuery.isFunction(target) ) target = {}; // extend jQuery itself if only one argument is passed if ( length == i ) { target = this; --i; } for ( ; i < length; i++ ) // Only deal with non-null/undefined values if ( (options = arguments[ i ]) != null ) // Extend the base object for ( var name in options ) { var src = target[ name ], copy = options[ name ]; // Prevent never-ending loop if ( target === copy ) continue; // Recurse if we're merging object values if ( deep && copy && typeof copy === "object" && !copy.nodeType ) target[ name ] = jQuery.extend( deep, // Never move original objects, clone them src || ( copy.length != null ? [ ] : { } ) , copy ); // Don't bring in undefined values else if ( copy !== undefined ) target[ name ] = copy; } // Return the modified object return target; }; // exclude the following css properties to add px var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i, // cache defaultView defaultView = document.defaultView || {}, toString = Object.prototype.toString; jQuery.extend({ noConflict: function( deep ) { window.$ = _$; if ( deep ) window.jQuery = _jQuery; return jQuery; }, // See test/unit/core.js for details concerning isFunction. // Since version 1.3, DOM methods and functions like alert // aren't supported. They return false on IE (#2968). isFunction: function( obj ) { return toString.call(obj) === "[object Function]"; }, isArray: function( obj ) { return toString.call(obj) === "[object Array]"; }, // check if an element is in a (or is an) XML document isXMLDoc: function( elem ) { return elem.documentElement && !elem.body || elem.tagName && elem.ownerDocument && !elem.ownerDocument.body; }, // Evalulates a script in a global context globalEval: function( data ) { data = jQuery.trim( data ); if ( data ) { // Inspired by code by Andrea Giammarchi // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html var head = document.getElementsByTagName("head")[0] || document.documentElement, script = document.createElement("script"); script.type = "text/javascript"; if ( jQuery.support.scriptEval ) script.appendChild( document.createTextNode( data ) ); else script.text = data; // Use insertBefore instead of appendChild to circumvent an IE6 bug. // This arises when a base node is used (#2709). head.insertBefore( script, head.firstChild ); head.removeChild( script ); } }, nodeName: function( elem, name ) { return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase(); }, // args is for internal usage only each: function( object, callback, args ) { var name, i = 0, length = object.length; if ( args ) { if ( length === undefined ) { for ( name in object ) if ( callback.apply( object[ name ], args ) === false ) break; } else for ( ; i < length; ) if ( callback.apply( object[ i++ ], args ) === false ) break; // A special, fast, case for the most common use of each } else { if ( length === undefined ) { for ( name in object ) if ( callback.call( object[ name ], name, object[ name ] ) === false ) break; } else for ( var value = object[0]; i < length && callback.call( value, i, value ) !== false; value = object[++i] ){} } return object; }, prop: function( elem, value, type, i, name ) { // Handle executable functions if ( jQuery.isFunction( value ) ) value = value.call( elem, i ); // Handle passing in a number to a CSS property return typeof value === "number" && type == "curCSS" && !exclude.test( name ) ? value + "px" : value; }, className: { // internal only, use addClass("class") add: function( elem, classNames ) { jQuery.each((classNames || "").split(/\s+/), function(i, className){ if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) ) elem.className += (elem.className ? " " : "") + className; }); }, // internal only, use removeClass("class") remove: function( elem, classNames ) { if (elem.nodeType == 1) elem.className = classNames !== undefined ? jQuery.grep(elem.className.split(/\s+/), function(className){ return !jQuery.className.has( classNames, className ); }).join(" ") : ""; }, // internal only, use hasClass("class") has: function( elem, className ) { return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1; } }, // A method for quickly swapping in/out CSS properties to get correct calculations swap: function( elem, options, callback ) { var old = {}; // Remember the old values, and insert the new ones for ( var name in options ) { old[ name ] = elem.style[ name ]; elem.style[ name ] = options[ name ]; } callback.call( elem ); // Revert the old values for ( var name in options ) elem.style[ name ] = old[ name ]; }, css: function( elem, name, force ) { if ( name == "width" || name == "height" ) { var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ]; function getWH() { val = name == "width" ? elem.offsetWidth : elem.offsetHeight; var padding = 0, border = 0; jQuery.each( which, function() { padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0; border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0; }); val -= Math.round(padding + border); } if ( jQuery(elem).is(":visible") ) getWH(); else jQuery.swap( elem, props, getWH ); return Math.max(0, val); } return jQuery.curCSS( elem, name, force ); }, curCSS: function( elem, name, force ) { var ret, style = elem.style; // We need to handle opacity special in IE if ( name == "opacity" && !jQuery.support.opacity ) { ret = jQuery.attr( style, "opacity" ); return ret == "" ? "1" : ret; } // Make sure we're using the right name for getting the float value if ( name.match( /float/i ) ) name = styleFloat; if ( !force && style && style[ name ] ) ret = style[ name ]; else if ( defaultView.getComputedStyle ) { // Only "float" is needed here if ( name.match( /float/i ) ) name = "float"; name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase(); var computedStyle = defaultView.getComputedStyle( elem, null ); if ( computedStyle ) ret = computedStyle.getPropertyValue( name ); // We should always get a number back from opacity if ( name == "opacity" && ret == "" ) ret = "1"; } else if ( elem.currentStyle ) { var camelCase = name.replace(/\-(\w)/g, function(all, letter){ return letter.toUpperCase(); }); ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ]; // From the awesome hack by Dean Edwards // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291 // If we're not dealing with a regular pixel number // but a number that has a weird ending, we need to convert it to pixels if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) { // Remember the original values var left = style.left, rsLeft = elem.runtimeStyle.left; // Put in the new values to get a computed value out elem.runtimeStyle.left = elem.currentStyle.left; style.left = ret || 0; ret = style.pixelLeft + "px"; // Revert the changed values style.left = left; elem.runtimeStyle.left = rsLeft; } } return ret; }, clean: function( elems, context, fragment ) { context = context || document; // !context.createElement fails in IE with an error but returns typeof 'object' if ( typeof context.createElement === "undefined" ) context = context.ownerDocument || context[0] && context[0].ownerDocument || document; // If a single string is passed in and it's a single tag // just do a createElement and skip the rest if ( !fragment && elems.length === 1 && typeof elems[0] === "string" ) { var match = /^<(\w+)\s*\/?>$/.exec(elems[0]); if ( match ) return [ context.createElement( match[1] ) ]; } var ret = [], scripts = [], div = context.createElement("div"); jQuery.each(elems, function(i, elem){ if ( typeof elem === "number" ) elem += ''; if ( !elem ) return; // Convert html string into DOM nodes if ( typeof elem === "string" ) { // Fix "XHTML"-style tags in all browsers elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){ return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ? all : front + ">"; }); // Trim whitespace, otherwise indexOf won't work as expected var tags = jQuery.trim( elem ).toLowerCase(); var wrap = // option or optgroup !tags.indexOf("", "" ] || !tags.indexOf("", "" ] || tags.match(/^<(thead|tbody|tfoot|colg|cap)/) && [ 1, "
