jquery-1.2.js

里面包括了一些javascript的常用用法

(function(){
/*
 * jQuery 1.2 - New Wave Javascript
 *
 * Copyright (c) 2007 John Resig (jquery.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * $Date: 2007-09-10 15:45:49 -0400 (Mon, 10 Sep 2007) $
 * $Rev: 3219 $
 */

// Map over jQuery in case of overwrite
if ( typeof jQuery != "undefined" )
	var _jQuery = jQuery;

var jQuery = window.jQuery = function(a,c) {
	// If the context is global, return a new object
	if ( window == this || !this.init )
		return new jQuery(a,c);
	
	return this.init(a,c);
};

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

var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/;

jQuery.fn = jQuery.prototype = {
	init: function(a,c) {
		// Make sure that a selection was provided
		a = a || document;

		// Handle HTML strings
		if ( typeof a  == "string" ) {
			var m = quickExpr.exec(a);
			if ( m && (m[1] || !c) ) {
				// HANDLE: $(html) -> $(array)
				if ( m[1] )
					a = jQuery.clean( [ m[1] ], c );

				// HANDLE: $("#id")
				else {
					var tmp = document.getElementById( m[3] );
					if ( tmp )
						// Handle the case where IE and Opera return items
						// by name instead of ID
						if ( tmp.id != m[3] )
							return jQuery().find( a );
						else {
							this[0] = tmp;
							this.length = 1;
							return this;
						}
					else
						a = [];
				}

			// HANDLE: $(expr)
			} else
				return new jQuery( c ).find( a );

		// HANDLE: $(function)
		// Shortcut for document ready
		} else if ( jQuery.isFunction(a) )
			return new jQuery(document)[ jQuery.fn.ready ? "ready" : "load" ]( 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 ] );
	},
	
	jquery: "1.2",

	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(a);
		ret.prevObject = this;
		return ret;
	},
	
	setArray: function( a ) {
		this.length = 0;
		Array.prototype.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 this.length && jQuery[ type || "attr" ]( this[0], key ) || undefined;
			else {
				obj = {};
				obj[ key ] = value;
			}
		
		// Check to see if we're setting style values
		return this.each(function(index){
			// Set all the styles
			for ( var prop in obj )
				jQuery.attr(
					type ? this.style : this,
					prop, jQuery.prop(this, obj[prop], type, index, prop)
				);
		});
	},

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

	text: function(e) {
		if ( typeof e != "object" && e != null )
			return this.empty().append( document.createTextNode( e ) );

		var t = "";
		jQuery.each( e || this, function(){
			jQuery.each( this.childNodes, function(){
				if ( this.nodeType != 8 )
					t += this.nodeType != 1 ?
						this.nodeValue : jQuery.fn.text([ this ]);
			});
		});
		return t;
	},

	wrapAll: function(html) {
		if ( this[0] )
			// The elements to wrap the target around
			jQuery(html, this[0].ownerDocument)
				.clone()
				.insertBefore(this[0])
				.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, 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) {
		var data = jQuery.map(this, function(a){ return jQuery.find(t,a); });
		return this.pushStack( /[^+>] [^+>]/.test( t ) || t.indexOf("..") > -1 ?
			jQuery.unique( data ) : data );
	},

	clone: function(events) {
		// Do the clone
		var ret = this.map(function(){
			return this.outerHTML ? jQuery(this.outerHTML)[0] : this.cloneNode(true);
		});
		
		if (events === true) {
			var clone = ret.find("*").andSelf();

			this.find("*").andSelf().each(function(i) {
				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(t) {
		return this.pushStack(
			jQuery.isFunction( t ) &&
			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) {
				return ( t.constructor == Array || t.jquery )
					? jQuery.inArray( a, t ) < 0
					: a != t;
			})
		);
	},

	add: function(t) {
		return this.pushStack( jQuery.merge(
			this.get(),
			t.constructor == String ?
				jQuery(t).get() :
				t.length != undefined && (!t.nodeName || t.nodeName == "FORM") ?
					t : [t] )
		);
	},

	is: function(expr) {
		return expr ? jQuery.multiFilter(expr,this).length > 0 : false;
	},

	hasClass: function(expr) {
		return this.is("." + expr);
	},
	
	val: function( val ) {
		if ( val == undefined ) {
			if ( this.length ) {
				var elem = this[0];
		    	
				// We need to handle select boxes special
				if ( jQuery.nodeName(elem, "select") ) {
					var index = elem.selectedIndex,
						a = [],
						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
							var val = jQuery.browser.msie && !option.attributes["value"].specified ? option.text : option.value;
							
							// We don't need an array for one selects
							if ( one )
								return val;
							
							// Multi-Selects return an array
							a.push(val);
						}
					}
					
					return a;
					
				// Everything else, we just grab the value
				} else
					return this[0].value.replace(/\r/g, "");
			}
		} else
			return this.each(function(){
				if ( val.constructor == Array && /radio|checkbox/.test(this.type) )
					this.checked = (jQuery.inArray(this.value, val) >= 0 ||
						jQuery.inArray(this.name, val) >= 0);
				else if ( jQuery.nodeName(this, "select") ) {
					var tmp = val.constructor == Array ? val : [val];

					jQuery("option", this).each(function(){
						this.selected = (jQuery.inArray(this.value, tmp) >= 0 ||
						jQuery.inArray(this.text, tmp) >= 0);
					});

					if ( !tmp.length )
						this.selectedIndex = -1;
				} else
					this.value = val;
			});
	},
	
	html: function( val ) {
		return val == undefined ?
			( this.length ? this[0].innerHTML : null ) :
			this.empty().append( val );
	},

	replaceWith: function( val ) {
		return this.after( val ).remove();
	},

	slice: function() {
		return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
	},

	map: function(fn) {
		return this.pushStack(jQuery.map( this, function(elem,i){
			return fn.call( elem, i, elem );
		}));
	},

	andSelf: function() {
		return this.add( this.prevObject );
	},
	
	domManip: function(args, table, dir, fn) {
		var clone = this.length > 1, a; 

		return this.each(function(){
			if ( !a ) {
				a = jQuery.clean(args, this.ownerDocument);
				if ( dir < 0 )
					a.reverse();
			}

			var obj = this;

			if ( table && jQuery.nodeName(this, "table") && jQuery.nodeName(a[0], "tr") )
				obj = this.getElementsByTagName("tbody")[0] || this.appendChild(document.createElement("tbody"));

			jQuery.each( a, function(){
				if ( jQuery.nodeName(this, "script") ) {
					if ( this.src )
						jQuery.ajax({ url: this.src, async: false, dataType: "script" });
					else
						jQuery.globalEval( this.text || this.textContent || this.innerHTML || "" );
				} else
					fn.apply( obj, [ clone ? this.cloneNode(true) : this ] );
			});
		});
	}
};

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

	// Handle a deep copy situation
	if ( target.constructor == Boolean ) {
		deep = target;
		target = arguments[1] || {};
	}

	// extend jQuery itself if only one argument is passed
	if ( al == 1 ) {
		target = this;
		a = 0;
	}

	var prop;

	for ( ; a < al; a++ )
		// Only deal with non-null/undefined values
		if ( (prop = arguments[a]) != null )
			// Extend the base object
			for ( var i in prop ) {
				// Prevent never-ending loop
				if ( target == prop[i] )
					continue;

				// Recurse if we're merging object values
				if ( deep && typeof prop[i] == 'object' && target[i] )
					jQuery.extend( target[i], prop[i] );

				// Don't bring in undefined values
				else if ( prop[i] != undefined )
					target[i] = prop[i];
			}

	// Return the modified object
	return target;
};

var expando = "jQuery" + (new Date()).getTime(), uuid = 0, win = {};

jQuery.extend({
	noConflict: function(deep) {
		window.$ = _$;
		if ( deep )
			window.jQuery = _jQuery;
		return jQuery;
	},

	// This may seem like some crazy code, but trust me when I say that this
	// is the only cross-browser way to do this. --John
	isFunction: function( fn ) {
		return !!fn && typeof fn != "string" && !fn.nodeName && 
			fn.constructor != Array && /function/i.test( fn + "" );
	},
	
	// check if an element is in a XML document
	isXMLDoc: function(elem) {
		return elem.documentElement && !elem.body ||
			elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
	},

	// Evalulates a script in a global context
	// Evaluates Async. in Safari 2 :-(
	globalEval: function( data ) {
		data = jQuery.trim( data );
		if ( data ) {
			if ( window.execScript )
				window.execScript( data );
			else if ( jQuery.browser.safari )
				// safari doesn't provide a synchronous global eval
				window.setTimeout( data, 0 );
			else
				eval.call( window, data );
		}
	},

	nodeName: function( elem, name ) {
		return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
	},
	
	cache: {},
	
	data: function( elem, name, data ) {
		elem = elem == window ? win : elem;