jquery.js

应用JavaScript结合jquery写的小demo

	
				// and execute any waiting functions
				jQuery.ready();
			}
		}, 10);
	} 

	// A fallback to window.onload, that will always work
	jQuery.event.add( window, "load", jQuery.ready );
	
};
jQuery.fn.extend({

	// overwrite the old show method
	_show: jQuery.fn.show,

	show: function(speed,callback){
		return speed ? this.animate({
			height: "show", width: "show", opacity: "show"
		}, speed, callback) : this._show();
	},
	
	// Overwrite the old hide method
	_hide: jQuery.fn.hide,

	hide: function(speed,callback){
		return speed ? this.animate({
			height: "hide", width: "hide", opacity: "hide"
		}, speed, callback) : this._hide();
	},

	slideDown: function(speed,callback){
		return this.animate({height: "show"}, speed, callback);
	},

	slideUp: function(speed,callback){
		return this.animate({height: "hide"}, speed, callback);
	},

	slideToggle: function(speed,callback){
		return this.each(function(){
			var state = $(this).is(":hidden") ? "show" : "hide";
			$(this).animate({height: state}, speed, callback);
		});
	},

	fadeIn: function(speed,callback){
		return this.animate({opacity: "show"}, speed, callback);
	},

	fadeOut: function(speed,callback){
		return this.animate({opacity: "hide"}, speed, callback);
	},

	fadeTo: function(speed,to,callback){
		return this.animate({opacity: to}, speed, callback);
	},
	animate: function(prop,speed,callback) {
		return this.queue(function(){
		
			this.curAnim = prop;
			
			for ( var p in prop ) {
				var e = new jQuery.fx( this, jQuery.speed(speed,callback), p );
				if ( prop[p].constructor == Number )
					e.custom( e.cur(), prop[p] );
				else
					e[ prop[p] ]( prop );
			}
			
		});
	},
	queue: function(type,fn){
		if ( !fn ) {
			fn = type;
			type = "fx";
		}
	
		return this.each(function(){
			if ( !this.queue )
				this.queue = {};
	
			if ( !this.queue[type] )
				this.queue[type] = [];
	
			this.queue[type].push( fn );
		
			if ( this.queue[type].length == 1 )
				fn.apply(this);
		});
	}

});

jQuery.extend({

	setAuto: function(e,p) {
		if ( e.notAuto ) return;

		if ( p == "height" && e.scrollHeight != parseInt(jQuery.curCSS(e,p)) ) return;
		if ( p == "width" && e.scrollWidth != parseInt(jQuery.curCSS(e,p)) ) return;

		// Remember the original height
		var a = e.style[p];

		// Figure out the size of the height right now
		var o = jQuery.curCSS(e,p,1);

		if ( p == "height" && e.scrollHeight != o ||
			p == "width" && e.scrollWidth != o ) return;

		// Set the height to auto
		e.style[p] = e.currentStyle ? "" : "auto";

		// See what the size of "auto" is
		var n = jQuery.curCSS(e,p,1);

		// Revert back to the original size
		if ( o != n && n != "auto" ) {
			e.style[p] = a;
			e.notAuto = true;
		}
	},
	
	speed: function(s,o) {
		o = o || {};
		
		if ( o.constructor == Function )
			o = { complete: o };
		
		var ss = { slow: 600, fast: 200 };
		o.duration = (s && s.constructor == Number ? s : ss[s]) || 400;
	
		// Queueing
		o.oldComplete = o.complete;
		o.complete = function(){
			jQuery.dequeue(this, "fx");
			if ( o.oldComplete && o.oldComplete.constructor == Function )
				o.oldComplete.apply( this );
		};
	
		return o;
	},
	
	queue: {},
	
	dequeue: function(elem,type){
		type = type || "fx";
	
		if ( elem.queue && elem.queue[type] ) {
			// Remove self
			elem.queue[type].shift();
	
			// Get next function
			var f = elem.queue[type][0];
		
			if ( f ) f.apply( elem );
		}
	},

	/*
	 * I originally wrote fx() as a clone of moo.fx and in the process
	 * of making it small in size the code became illegible to sane
	 * people. You've been warned.
	 */
	
	fx: function( elem, options, prop ){
	
		var z = this;
	
		// The users options
		z.o = {
			duration: options.duration || 400,
			complete: options.complete,
			step: options.step
		};
	
		// The element
		z.el = elem;
	
		// The styles
		var y = z.el.style;
	
		// Simple function for setting a style value
		z.a = function(){
			if ( options.step )
				options.step.apply( elem, [ z.now ] );

			if ( prop == "opacity" ) {
				if (jQuery.browser.mozilla && z.now == 1) z.now = 0.9999;
				if (window.ActiveXObject)
					y.filter = "alpha(opacity=" + z.now*100 + ")";
				else
					y.opacity = z.now;

			// My hate for IE will never die
			} else if ( parseInt(z.now) )
				y[prop] = parseInt(z.now) + "px";
				
			y.display = "block";
		};
	
		// Figure out the maximum number to run to
		z.max = function(){
			return parseFloat( jQuery.css(z.el,prop) );
		};
	
		// Get the current size
		z.cur = function(){
			var r = parseFloat( jQuery.curCSS(z.el, prop) );
			return r && r > -10000 ? r : z.max();
		};
	
		// Start an animation from one number to another
		z.custom = function(from,to){
			z.startTime = (new Date()).getTime();
			z.now = from;
			z.a();
	
			z.timer = setInterval(function(){
				z.step(from, to);
			}, 13);
		};
	
		// Simple 'show' function
		z.show = function( p ){
			if ( !z.el.orig ) z.el.orig = {};

			// Remember where we started, so that we can go back to it later
			z.el.orig[prop] = this.cur();

			z.custom( 0, z.el.orig[prop] );

			// Stupid IE, look what you made me do
			if ( prop != "opacity" )
				y[prop] = "1px";
		};
	
		// Simple 'hide' function
		z.hide = function(){
			if ( !z.el.orig ) z.el.orig = {};

			// Remember where we started, so that we can go back to it later
			z.el.orig[prop] = this.cur();

			z.o.hide = true;

			// Begin the animation
			z.custom(z.el.orig[prop], 0);
		};
	
		// IE has trouble with opacity if it does not have layout
		if ( jQuery.browser.msie && !z.el.currentStyle.hasLayout )
			y.zoom = "1";
	
		// Remember  the overflow of the element
		if ( !z.el.oldOverlay )
			z.el.oldOverflow = jQuery.css( z.el, "overflow" );
	
		// Make sure that nothing sneaks out
		y.overflow = "hidden";
	
		// Each step of an animation
		z.step = function(firstNum, lastNum){
			var t = (new Date()).getTime();
	
			if (t > z.o.duration + z.startTime) {
				// Stop the timer
				clearInterval(z.timer);
				z.timer = null;

				z.now = lastNum;
				z.a();

				z.el.curAnim[ prop ] = true;
				
				var done = true;
				for ( var i in z.el.curAnim )
					if ( z.el.curAnim[i] !== true )
						done = false;
						
				if ( done ) {
					// Reset the overflow
					y.overflow = z.el.oldOverflow;
				
					// Hide the element if the "hide" operation was done
					if ( z.o.hide ) 
						y.display = 'none';
					
					// Reset the property, if the item has been hidden
					if ( z.o.hide ) {
						for ( var p in z.el.curAnim ) {
							y[ p ] = z.el.orig[p] + ( p == "opacity" ? "" : "px" );
	
							// set its height and/or width to auto
							if ( p == 'height' || p == 'width' )
								jQuery.setAuto( z.el, p );
						}
					}
				}

				// If a callback was provided, execute it
				if( done && z.o.complete && z.o.complete.constructor == Function )
					// Execute the complete function
					z.o.complete.apply( z.el );
			} else {
				// Figure out where in the animation we are and set the number
				var p = (t - this.startTime) / z.o.duration;
				z.now = ((-Math.cos(p*Math.PI)/2) + 0.5) * (lastNum-firstNum) + firstNum;
	
				// Perform the next step of the animation
				z.a();
			}
		};
	
	}

});
// AJAX Plugin
// Docs Here:
// http://jquery.com/docs/ajax/
jQuery.fn.loadIfModified = function( url, params, callback ) {
	this.load( url, params, callback, 1 );
};
jQuery.fn.load = function( url, params, callback, ifModified ) {
	if ( url.constructor == Function )
		return this.bind("load", url);

	callback = callback || function(){};

	// Default to a GET request
	var type = "GET";

	// If the second parameter was provided
	if ( params ) {
		// If it's a function
		if ( params.constructor == Function ) {
			// We assume that it's the callback
			callback = params;
			params = null;
			
		// Otherwise, build a param string
		} else {
			params = jQuery.param( params );
			type = "POST";
		}
	}
	
	var self = this;
	
	// Request the remote document
	jQuery.ajax( type, url, params,function(res, status){
		
		if ( status == "success" || !ifModified && status == "notmodified" ) {
			// Inject the HTML into all the matched elements
			self.html(res.responseText).each( callback, [res.responseText, status] );
			
			// Execute all the scripts inside of the newly-injected HTML
			$("script", self).each(function(){
				if ( this.src )
					$.getScript( this.src );
				else
					eval.call( window, this.text || this.textContent || this.innerHTML || "" );
			});
		} else
			callback.apply( self, [res.responseText, status] );

	}, ifModified);
	
	return this;
};

// If IE is used, create a wrapper for the XMLHttpRequest object
if ( jQuery.browser.msie && typeof XMLHttpRequest == "undefined" )
	XMLHttpRequest = function(){
		return new ActiveXObject(
			navigator.userAgent.indexOf("MSIE 5") >= 0 ?
			"Microsoft.XMLHTTP" : "Msxml2.XMLHTTP"
		);
	};

// Attach a bunch of functions for handling common AJAX events
new function(){
	var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(',');
	
	for ( var i = 0; i < e.length; i++ ) new function(){
		var o = e[i];
		jQuery.fn[o] = function(f){
			return this.bind(o, f);
		};
	};
};

jQuery.extend({

	get: function( url, data, callback, type, ifModified ) {
		if ( data.constructor == Function ) {
			type = callback;
			callback = data;
			data = null;
		}
		
		if ( data ) url += "?" + jQuery.param(data);
		
		// Build and start the HTTP Request
		jQuery.ajax( "GET", url, null, function(r, status) {
			if ( callback ) callback( jQuery.httpData(r,type), status );
		}, ifModified);
	},

	getIfModified: function( url, data, callback, type ) {
		jQuery.get(url, data, callback, type, 1);
	},

	getScript: function( url, data, callback ) {
		jQuery.get(url, data, callback, "script");
	},
	post: function( url, data, callback, type ) {
		// Build and start the HTTP Request
		jQuery.ajax( "POST", url, jQuery.param(data), function(r, status) {
			if ( callback ) callback( jQuery.httpData(r,type), status );
		});
	},
	
	// timeout (ms)
	timeout: 0,

	ajaxTimeout: function(timeout) {
		jQuery.timeout = timeout;
	},

	// Last-Modified header cache for next request
	lastModified: {},
	ajax: function( type, url, data, ret, ifModified ) {
		// If only a single argument was passed in,
		// assume that it is a object of key/value pairs
		if ( !url ) {
			ret = type.complete;
			var success = type.success;
			var error = type.error;
			data = type.data;
			url = type.url;
			type = type.type;
		}
		
		// Watch for a new set of requests
		if ( ! jQuery.active++ )
			jQuery.event.trigger( "ajaxStart" );

		var requestDone = false;
	
		// Create the request object
		var xml = new XMLHttpRequest();
	
		// Open the socket
		xml.open(type || "GET", url, true);
		
		// Set the correct header, if data is being sent
		if ( data )
			xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		
		// Set the If-Modified-Since header, if ifModified mode.
		if ( ifModified )
			xml.setRequestHeader("If-Modified-Since",
				jQuery.lastModified[url] || "Thu, 01 Jan 1970 00:00:00 GMT" );
		
		// Set header so calling script knows that it's an XMLHttpRequest
		xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
	
		// Make sure the browser sends the right content length
		if ( xml.overrideMimeType )
			xml.setRequestHeader("Connection", "close");
		
		// Wait for a response to come back
		var onreadystatechange = function(istimeout){
			// The transfer is complete and the data is available, or the request timed out
			if ( xml && (xml.readyState == 4 || istimeout == "timeout") ) {
				requestDone = true;

				var status = jQuery.httpSuccess( xml ) && istimeout != "timeout" ?
					ifModified && jQuery.httpNotModified( xml, url ) ? "notmodified" : "success" : "error";
				
				// Make sure that the request was successful or notmodified
				if ( status != "error" ) {
					// Cache Last-Modified header, if ifModified mode.
					var modRes = xml.getResponseHeader("Last-Modified");
					if ( ifModified && modRes ) jQuery.lastModified[url] = modRes;
					
					// If a local callback was specified, fire it
					if ( success ) success( xml, status );
					
					// Fire the global callback
					jQuery.event.trigger( "ajaxSuccess" );
				
				// Otherwise, the request was not successful
				} else {
					// If a local callback was specified, fire it
					if ( error ) error( xml, status );
					
					// Fire the global callback
					jQuery.event.trigger( "ajaxError" );
				}
				
				// The request was completed
				jQuery.event.trigger( "ajaxComplete" );
				
				// Handle the global AJAX counter
				if ( ! --jQuery.active )
					jQuery.event.trigger( "ajaxStop" );
	
				// Process result
				if ( ret ) ret(xml, status);
				
				// Stop memory leaks
				xml.onreadystatechange = function(){};
				xml = null;
				
			}
		};
		xml.onreadystatechange = onreadystatechange;
		
		// Timeout checker
		if(jQuery.timeout > 0)
			setTimeout(function(){
				// Check to see if the request is still happening
				if (xml) {
					// Cancel the request
					xml.abort();

					if ( !requestDone ) onreadystatechange( "timeout" );

					// Clear from memory
					xml = null;
				}
			}, jQuery.timeout);
		
		// Send the data
		xml.send(data);
	},
	
	// Counter for holding the number of active queries
	active: 0,
	
	// Determines if an XMLHttpRequest was successful or not
	httpSuccess: function(r) {
		try {
			return !r.status && location.protocol == "file:" ||
				( r.status >= 200 && r.status < 300 ) || r.status == 304 ||
				jQuery.browser.safari && r.status == undefined;
		} catch(e){}

		return false;
	},

	// Determines if an XMLHttpRequest returns NotModified
	httpNotModified: function(xml, url) {
		try {
			var xmlRes = xml.getResponseHeader("Last-Modified");

			// Firefox always returns 200. check Last-Modified date
			return xml.status == 304 || xmlRes == jQuery.lastModified[url] ||
				jQuery.browser.safari && xml.status == undefined;
		} catch(e){}

		return false;
	},
	
	// Get the data out of an XMLHttpRequest.
	// Return parsed XML if content-type header is "xml" and type is "xml" or omitted,
	// otherwise return plain text.
	httpData: function(r,type) {
		var ct = r.getResponseHeader("content-type");
		var data = !type && ct && ct.indexOf("xml") >= 0;
		data = type == "xml" || data ? r.responseXML : r.responseText;

		// If the type is "script", eval it
		if ( type == "script" ) eval.call( window, data );

		// Get the JavaScript object, if JSON is used.
		if ( type == "json" ) eval( "data = " + data );

		return data;
	},
	
	// Serialize an array of form elements or a set of
	// key/values into a query string
	param: function(a) {
		var s = [];
		
		// If an array was passed in, assume that it is an array
		// of form elements
		if ( a.constructor == Array ) {
			// Serialize the form elements
			for ( var i = 0; i < a.length; i++ )
				s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
			
		// Otherwise, assume that it's an object of key/value pairs
		} else {
			// Serialize the key/values
			for ( var j in a )
				s.push( j + "=" + encodeURIComponent( a[j] ) );
		}
		
		// Return the resulting serialization
		return s.join("&");
	}

});