jquery.js

应用JavaScript结合jquery写的小demo

/* prevent execution of jQuery if included more than once */
if(typeof window.jQuery == "undefined") {
/*
 * jQuery 1.1b - New Wave Javascript
 *
 * Copyright (c) 2006 John Resig (jquery.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * $Date: 2007-01-10 23:52:41 -0500 (Wed, 10 Jan 2007) $
 * $Rev: 993 $
 */

// Global undefined variable
window.undefined = window.undefined;
var jQuery = function(a,c) {
	// If the context is global, return a new object
	if ( window == this )
		return new jQuery(a,c);

	// Make sure that a selection was provided
	a = a || document;
	
	// HANDLE: $(function)
	// Shortcut for document ready
	// Safari reports typeof on DOM NodeLists as a function
	if ( typeof a == "function" && !a.nodeType && a[0] == undefined )
		return new jQuery(document)[ jQuery.fn.ready ? "ready" : "load" ]( a );
	
	// Handle HTML strings
	if ( typeof a  == "string" ) {
		// HANDLE: $(html) -> $(array)
		var m = /^[^<]*(<.+>)[^>]*$/.exec(a);
		if ( m )
			a = jQuery.clean( [ m[1] ] );
		
		// HANDLE: $(expr)
		else
			return new jQuery( c ).find( a );
	}
	
	return this.setArray(
		// HANDLE: $(array)
		a.constructor == Array && a ||

		// HANDLE: $(arraylike)
		// Watch for when an array-like object is passed as the selector
		(a.jquery || a.length && a != window && !a.nodeType && a[0] != undefined && a[0].nodeType) && jQuery.makeArray( a ) ||

		// HANDLE: $(*)
		[ a ] );
};

// Map over the $ in case of overwrite
if ( typeof $ != "undefined" )
	jQuery._$ = $;
	
// Map the jQuery namespace to the '$' one
var $ = jQuery;

jQuery.fn = jQuery.prototype = {
	jquery: "1.1b",

	size: function() {
		return this.length;
	},
	
	length: 0,

	get: function( num ) {
		return num == undefined ?

			// Return a 'clean' array
			jQuery.makeArray( this ) :

			// Return just the object
			this[num];
	},
	pushStack: function( a ) {
		var ret = jQuery(this);
		ret.prevObject = this;
		return ret.setArray( a );
	},
	setArray: function( a ) {
		this.length = 0;
		[].push.apply( this, a );
		return this;
	},
	each: function( fn, args ) {
		return jQuery.each( this, fn, args );
	},
	index: function( obj ) {
		var pos = -1;
		this.each(function(i){
			if ( this == obj ) pos = i;
		});
		return pos;
	},

	attr: function( key, value, type ) {
		var obj = key;
		
		// Look for the case where we're accessing a style value
		if ( key.constructor == String )
			if ( value == undefined )
				return jQuery[ type || "attr" ]( this[0], key );
			else {
				obj = {};
				obj[ key ] = value;
			}
		
		// Check to see if we're setting style values
		return this.each(function(){
			// Set all the styles
			for ( var prop in obj )
				jQuery.attr(
					type ? this.style : this,
					prop, jQuery.prop(this, obj[prop], type)
				);
		});
	},

	css: function( key, value ) {
		return this.attr( key, value, "curCSS" );
	},

	text: function(e) {
		var type = this.length && this[0].innerText == undefined ?
			"textContent" : "innerText";
			
		return e == undefined ?
			jQuery.map(this, function(a){ return a[ type ]; }).join('') :
			this.each(function(){ this[ type ] = e; });
	},

	wrap: function() {
		// The elements to wrap the target around
		var a = jQuery.clean(arguments);

		// Wrap each of the matched elements individually
		return this.each(function(){
			// Clone the structure that we're using to wrap
			var b = a[0].cloneNode(true);

			// Insert it before the element to be wrapped
			this.parentNode.insertBefore( b, this );

			// Find the deepest point in the wrap structure
			while ( b.firstChild )
				b = b.firstChild;

			// Move the matched element to within the wrap structure
			b.appendChild( this );
		});
	},
	append: function() {
		return this.domManip(arguments, true, 1, function(a){
			this.appendChild( a );
		});
	},
	prepend: function() {
		return this.domManip(arguments, true, -1, function(a){
			this.insertBefore( a, this.firstChild );
		});
	},
	before: function() {
		return this.domManip(arguments, false, 1, function(a){
			this.parentNode.insertBefore( a, this );
		});
	},
	after: function() {
		return this.domManip(arguments, false, -1, function(a){
			this.parentNode.insertBefore( a, this.nextSibling );
		});
	},
	end: function() {
		return this.prevObject || jQuery([]);
	},
	find: function(t) {
		return this.pushStack( jQuery.map( this, function(a){
			return jQuery.find(t,a);
		}) );
	},
	clone: function(deep) {
		return this.pushStack( jQuery.map( this, function(a){
			return a.cloneNode( deep != undefined ? deep : true );
		}) );
	},

	filter: function(t) {
		return this.pushStack(
			t.constructor == Function &&
			jQuery.grep(this, function(el, index){
				return t.apply(el, [index])
			}) ||

			jQuery.multiFilter(t,this) );
	},

	not: function(t) {
		return this.pushStack(
			t.constructor == String &&
			jQuery.multiFilter(t,this,true) ||

			jQuery.grep(this,function(a){
					if ( t.constructor == Array || t.jquery )
						return !jQuery.inArray( t, a );
					else
						return a != t;
			}) );
	},

	add: function(t) {
		return this.pushStack( jQuery.merge(
			this.get(),
			typeof t == "string" ? jQuery(t).get() : t )
		);
	},
	is: function(expr) {
		return expr ? jQuery.filter(expr,this).r.length > 0 : false;
	},

	val: function( val ) {
		return val == undefined ?
			( this.length ? this[0].value : null ) :
			this.attr( "value", val );
	},

	html: function( val ) {
		return val == undefined ?
			( this.length ? this[0].innerHTML : null ) :
			this.empty().append( val );
	},
	domManip: function(args, table, dir, fn){
		var clone = this.length > 1; 
		var a = jQuery.clean(args);
		if ( dir < 0 )
			a.reverse();

		return this.each(function(){
			var obj = this;

			if ( table && this.nodeName.toUpperCase() == "TABLE" && a[0].nodeName.toUpperCase() == "TR" )
				obj = this.getElementsByTagName("tbody")[0] || this.appendChild(document.createElement("tbody"));

			for ( var i = 0, al = a.length; i < al; i++ )
				fn.apply( obj, [ clone ? a[i].cloneNode(true) : a[i] ] );

		});
	}
};

jQuery.extend = jQuery.fn.extend = function() {
	// copy reference to target object
	var target = arguments[0],
		a = 1;

	// extend jQuery itself if only one argument is passed
	if ( arguments.length == 1 ) {
		target = this;
		a = 0;
	}
	var prop;
	while (prop = arguments[a++])
		// Extend the base object
		for ( var i in prop ) target[i] = prop[i];

	// Return the modified object
	return target;
};

jQuery.extend({
	noConflict: function() {
		if ( jQuery._$ )
			$ = jQuery._$;
	},
	// args is for internal usage only
	each: function( obj, fn, args ) {
		if ( obj.length == undefined )
			for ( var i in obj )
				fn.apply( obj[i], args || [i, obj[i]] );
		else
			for ( var i = 0, ol = obj.length; i < ol; i++ )
				if ( fn.apply( obj[i], args || [i, obj[i]] ) === false ) break;
		return obj;
	},
	
	prop: function(elem, value, type){
			// Handle executable functions
			if ( value.constructor == Function )
				return value.call( elem )

			// Handle passing in a number to a CSS property
			if ( value.constructor == Number && type == "css" )
				return value + "px";

			return value;
	},

	className: {
		// internal only, use addClass("class")
		add: function( elem, c ){
			jQuery.each( c.split(/\s+/), function(i, cur){
				if ( !jQuery.className.has( elem.className, cur ) )
					elem.className += ( elem.className ? " " : "" ) + cur;
			});
		},

		// internal only, use removeClass("class")
		remove: function( elem, c ){
			elem.className = c ?
				jQuery.grep( elem.className.split(/\s+/), function(cur){
					return !jQuery.className.has( c, cur );	
				}).join(' ') : "";
		},

		// internal only, use is(".class")
		has: function( t, c ) {
			t = t.className || t;
			return t && new RegExp("(^|\\s)" + c + "(\\s|$)").test( t );
		}
	},
	swap: function(e,o,f) {
		for ( var i in o ) {
			e.style["old"+i] = e.style[i];
			e.style[i] = o[i];
		}
		f.apply( e, [] );
		for ( var i in o )
			e.style[i] = e.style["old"+i];
	},

	css: function(e,p) {
		if ( p == "height" || p == "width" ) {
			var old = {}, oHeight, oWidth, d = ["Top","Bottom","Right","Left"];

			for ( var i = 0, dl = d.length; i < dl; i++ ) {
				old["padding" + d[i]] = 0;
				old["border" + d[i] + "Width"] = 0;
			}

			jQuery.swap( e, old, function() {
				if (jQuery.css(e,"display") != "none") {
					oHeight = e.offsetHeight;
					oWidth = e.offsetWidth;
				} else {
					e = jQuery(e.cloneNode(true))
						.find(":radio").removeAttr("checked").end()
						.css({
							visibility: "hidden", position: "absolute", display: "block", right: "0", left: "0"
						}).appendTo(e.parentNode)[0];

					var parPos = jQuery.css(e.parentNode,"position");
					if ( parPos == "" || parPos == "static" )
						e.parentNode.style.position = "relative";

					oHeight = e.clientHeight;
					oWidth = e.clientWidth;

					if ( parPos == "" || parPos == "static" )
						e.parentNode.style.position = "static";

					e.parentNode.removeChild(e);
				}
			});

			return p == "height" ? oHeight : oWidth;
		}

		return jQuery.curCSS( e, p );
	},

	curCSS: function(elem, prop, force) {
		var ret;
		
		if (prop == 'opacity' && jQuery.browser.msie)
			return jQuery.attr(elem.style, 'opacity');
			
		if (prop == "float" || prop == "cssFloat")
		    prop = jQuery.browser.msie ? "styleFloat" : "cssFloat";

		if (!force && elem.style[prop])
			ret = elem.style[prop];

		else if (document.defaultView && document.defaultView.getComputedStyle) {

			if (prop == "cssFloat" || prop == "styleFloat")
				prop = "float";

			prop = prop.replace(/([A-Z])/g,"-$1").toLowerCase();
			var cur = document.defaultView.getComputedStyle(elem, null);

			if ( cur )
				ret = cur.getPropertyValue(prop);
			else if ( prop == 'display' )
				ret = 'none';
			else
				jQuery.swap(elem, { display: 'block' }, function() {
				    var c = document.defaultView.getComputedStyle(this, '');
				    ret = c && c.getPropertyValue(prop) || '';
				});

		} else if (elem.currentStyle) {

			var newProp = prop.replace(/\-(\w)/g,function(m,c){return c.toUpperCase();});
			ret = elem.currentStyle[prop] || elem.currentStyle[newProp];
			
		}

		return ret;
	},
	
	clean: function(a) {
		var r = [];

		for ( var i = 0, al = a.length; i < al; i++ ) {
			var arg = a[i];
			
			 // Convert html string into DOM nodes
			if ( typeof arg == "string" ) {
				// Trim whitespace, otherwise indexOf won't work as expected
				var s = jQuery.trim(arg), div = document.createElement("div"), tb = [];

				var wrap =
					 // option or optgroup
					!s.indexOf("<opt") &&
					[1, "<select>", "</select>"] ||
					
					(!s.indexOf("<thead") || !s.indexOf("<tbody") || !s.indexOf("<tfoot")) &&
					[1, "<table>", "</table>"] ||
					
					!s.indexOf("<tr") &&
					[2, "<table><tbody>", "</tbody></table>"] ||
					
				 	// <thead> matched above
					(!s.indexOf("<td") || !s.indexOf("<th")) &&
					[3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
					
					[0,"",""];

				// Go to html and back, then peel off extra wrappers
				div.innerHTML = wrap[1] + s + wrap[2];
				
				// Move to the right depth
				while ( wrap[0]-- )
					div = div.firstChild;
				
				// Remove IE's autoinserted <tbody> from table fragments
				if ( jQuery.browser.msie ) {
					
					// String was a <table>, *may* have spurious <tbody>
					if ( !s.indexOf("<table") && s.indexOf("<tbody") < 0 ) 
						tb = div.firstChild && div.firstChild.childNodes;
						
					// String was a bare <thead> or <tfoot>
					else if ( wrap[1] == "<table>" && s.indexOf("<tbody") < 0 )
						tb = div.childNodes;

					for ( var n = tb.length-1; n >= 0 ; --n )
						if ( tb[n].nodeName.toUpperCase() == "TBODY" && !tb[n].childNodes.length )
							tb[n].parentNode.removeChild(tb[n]);
					
				}
				
				arg = div.childNodes;
			}
			
			if ( arg[0] == undefined )
				r.push( arg );
			else
				r = jQuery.merge( r, arg );

		}

		return r;
	},
	
	attr: function(elem, name, value){
		var fix = {
			"for": "htmlFor",
			"class": "className",
			"float": jQuery.browser.msie ? "styleFloat" : "cssFloat",
			cssFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
			innerHTML: "innerHTML",
			className: "className",
			value: "value",
			disabled: "disabled",
			checked: "checked",
			readonly: "readOnly",
			selected: "selected"
		};
		
		// IE actually uses filters for opacity ... elem is actually elem.style
		if ( name == "opacity" && jQuery.browser.msie && value != undefined ) {
			// IE has trouble with opacity if it does not have layout
			// Force it by setting the zoom level
			elem.zoom = 1; 

			// Set the alpha filter to set the opacity
			return elem.filter = elem.filter.replace(/alpha\([^\)]*\)/gi,"") +
				( value == 1 ? "" : "alpha(opacity=" + value * 100 + ")" );

		} else if ( name == "opacity" && jQuery.browser.msie )
			return elem.filter ? 
				parseFloat( elem.filter.match(/alpha\(opacity=(.*)\)/)[1] ) / 100 : 1;
		
		// Mozilla doesn't play well with opacity 1
		if ( name == "opacity" && jQuery.browser.mozilla && value == 1 )
			value = 0.9999;

		// Certain attributes only work when accessed via the old DOM 0 way
		if ( fix[name] ) {
			if ( value != undefined ) elem[fix[name]] = value;
			return elem[fix[name]];

		} else if ( value == undefined && jQuery.browser.msie && elem.nodeName && elem.nodeName.toUpperCase() == 'FORM' && (name == 'action' || name == 'method') )
			return elem.getAttributeNode(name).nodeValue;

		// IE elem.getAttribute passes even for style
		else if ( elem.tagName ) {
			if ( value != undefined ) elem.setAttribute( name, value );
			return elem.getAttribute( name );

		} else {
			name = name.replace(/-([a-z])/ig,function(z,b){return b.toUpperCase();});
			if ( value != undefined ) elem[name] = value;
			return elem[name];
		}
	},
	trim: function(t){
		return t.replace(/^\s+|\s+$/g, "");
	},

	makeArray: function( a ) {
		var r = [];

		if ( a.constructor != Array )
			for ( var i = 0, al = a.length; i < al; i++ )