jquery-1.2.js

里面包括了一些javascript的常用用法

	jQuery.fn[o] = function(f){
		return f ? this.bind(o, f) : this.trigger(o);
	};
});

var readyBound = false;

function bindReady(){
	if ( readyBound ) return;
	readyBound = true;

	// If Mozilla is used
	if ( jQuery.browser.mozilla || jQuery.browser.opera )
		// Use the handy event callback
		document.addEventListener( "DOMContentLoaded", jQuery.ready, false );
	
	// If IE is used, use the excellent hack by Matthias Miller
	// http://www.outofhanwell.com/blog/index.php?title=the_window_onload_problem_revisited
	else if ( jQuery.browser.msie ) {
	
		// Only works if you document.write() it
		document.write("<scr" + "ipt id=__ie_init defer=true " + 
			"src=//:><\/script>");
	
		// Use the defer script hack
		var script = document.getElementById("__ie_init");
		
		// script does not exist if jQuery is loaded dynamically
		if ( script ) 
			script.onreadystatechange = function() {
				if ( this.readyState != "complete" ) return;
				jQuery.ready();
			};
	
		// Clear from memory
		script = null;
	
	// If Safari  is used
	} else if ( jQuery.browser.safari )
		// Continually check to see if the document.readyState is valid
		jQuery.safariTimer = setInterval(function(){
			// loaded and complete are both valid states
			if ( document.readyState == "loaded" || 
				document.readyState == "complete" ) {
	
				// If either one are found, remove the timer
				clearInterval( jQuery.safariTimer );
				jQuery.safariTimer = null;
	
				// 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({
	load: function( url, params, callback ) {
		if ( jQuery.isFunction( url ) )
			return this.bind("load", url);

		var off = url.indexOf(" ");
		if ( off >= 0 ) {
			var selector = url.slice(off, url.length);
			url = url.slice(0, off);
		}

		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 ( jQuery.isFunction( params ) ) {
				// 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({
			url: url,
			type: type,
			data: params,
			complete: function(res, status){
				// If successful, inject the HTML into all the matched elements
				if ( status == "success" || status == "notmodified" )
					// See if a selector was specified
					self.html( selector ?
						// Create a dummy div to hold the results
						jQuery("<div/>")
							// inject the contents of the document in, removing the scripts
							// to avoid any 'Permission Denied' errors in IE
							.append(res.responseText.replace(/<script(.|\s)*?\/script>/g, ""))

							// Locate the specified elements
							.find(selector) :

						// If not, just inject the full result
						res.responseText );

				// Add delay to account for Safari's delay in globalEval
				setTimeout(function(){
					self.each( callback, [res.responseText, status, res] );
				}, 13);
			}
		});
		return this;
	},

	serialize: function() {
		return jQuery.param(this.serializeArray());
	},
	serializeArray: function() {
		return this.map(function(){
			return jQuery.nodeName(this, "form") ?
				jQuery.makeArray(this.elements) : this;
		})
		.filter(function(){
			return this.name && !this.disabled && 
				(this.checked || /select|textarea/i.test(this.nodeName) || 
					/text|hidden|password/i.test(this.type));
		})
		.map(function(i, elem){
			var val = jQuery(this).val();
			return val == null ? null :
				val.constructor == Array ?
					jQuery.map( val, function(i, val){
						return {name: elem.name, value: val};
					}) :
					{name: elem.name, value: val};
		}).get();
	}
});

// Attach a bunch of functions for handling common AJAX events
jQuery.each( "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess,ajaxSend".split(","), function(i,o){
	jQuery.fn[o] = function(f){
		return this.bind(o, f);
	};
});

var jsc = (new Date).getTime();

jQuery.extend({
	get: function( url, data, callback, type ) {
		// shift arguments if data argument was ommited
		if ( jQuery.isFunction( data ) ) {
			callback = data;
			data = null;
		}
		
		return jQuery.ajax({
			type: "GET",
			url: url,
			data: data,
			success: callback,
			dataType: type
		});
	},

	getScript: function( url, callback ) {
		return jQuery.get(url, null, callback, "script");
	},

	getJSON: function( url, data, callback ) {
		return jQuery.get(url, data, callback, "json");
	},

	post: function( url, data, callback, type ) {
		if ( jQuery.isFunction( data ) ) {
			callback = data;
			data = {};
		}

		return jQuery.ajax({
			type: "POST",
			url: url,
			data: data,
			success: callback,
			dataType: type
		});
	},

	ajaxSetup: function( settings ) {
		jQuery.extend( jQuery.ajaxSettings, settings );
	},

	ajaxSettings: {
		global: true,
		type: "GET",
		timeout: 0,
		contentType: "application/x-www-form-urlencoded",
		processData: true,
		async: true,
		data: null
	},
	
	// Last-Modified header cache for next request
	lastModified: {},

	ajax: function( s ) {
		var jsonp, jsre = /=(\?|%3F)/g, status, data;

		// Extend the settings, but re-extend 's' so that it can be
		// checked again later (in the test suite, specifically)
		s = jQuery.extend(true, s, jQuery.extend(true, {}, jQuery.ajaxSettings, s));

		// convert data if not already a string
		if ( s.data && s.processData && typeof s.data != "string" )
			s.data = jQuery.param(s.data);

		// Break the data into one single string
		var q = s.url.indexOf("?");
		if ( q > -1 ) {
			s.data = (s.data ? s.data + "&" : "") + s.url.slice(q + 1);
			s.url = s.url.slice(0, q);
		}

		// Handle JSONP Parameter Callbacks
		if ( s.dataType == "jsonp" ) {
			if ( !s.data || !s.data.match(jsre) )
				s.data = (s.data ? s.data + "&" : "") + (s.jsonp || "callback") + "=?";
			s.dataType = "json";
		}

		// Build temporary JSONP function
		if ( s.dataType == "json" && s.data && s.data.match(jsre) ) {
			jsonp = "jsonp" + jsc++;
			s.data = s.data.replace(jsre, "=" + jsonp);

			// We need to make sure
			// that a JSONP style response is executed properly
			s.dataType = "script";

			// Handle JSONP-style loading
			window[ jsonp ] = function(tmp){
				data = tmp;
				success();
				// Garbage collect
				window[ jsonp ] = undefined;
				try{ delete window[ jsonp ]; } catch(e){}
			};
		}

		if ( s.dataType == "script" && s.cache == null )
			s.cache = false;

		if ( s.cache === false && s.type.toLowerCase() == "get" )
			s.data = (s.data ? s.data + "&" : "") + "_=" + (new Date()).getTime();

		// If data is available, append data to url for get requests
		if ( s.data && s.type.toLowerCase() == "get" ) {
			s.url += "?" + s.data;

			// IE likes to send both get and post data, prevent this
			s.data = null;
		}

		// Watch for a new set of requests
		if ( s.global && ! jQuery.active++ )
			jQuery.event.trigger( "ajaxStart" );

		// If we're requesting a remote document
		// and trying to load JSON or Script
		if ( !s.url.indexOf("http") && s.dataType == "script" ) {
			var head = document.getElementsByTagName("head")[0];
			var script = document.createElement("script");
			script.src = s.url;

			// Handle Script loading
			if ( !jsonp && (s.success || s.complete) ) {
				var done = false;

				// Attach handlers for all browsers
				script.onload = script.onreadystatechange = function(){
					if ( !done && (!this.readyState || 
							this.readyState == "loaded" || this.readyState == "complete") ) {
						done = true;
						success();
						complete();
						head.removeChild( script );
					}
				};
			}

			head.appendChild(script);

			// We handle everything using the script element injection
			return;
		}

		var requestDone = false;

		// Create the request object; Microsoft failed to properly
		// implement the XMLHttpRequest in IE7, so we use the ActiveXObject when it is available
		var xml = window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();

		// Open the socket
		xml.open(s.type, s.url, s.async);

		// Set the correct header, if data is being sent
		if ( s.data )
			xml.setRequestHeader("Content-Type", s.contentType);

		// Set the If-Modified-Since header, if ifModified mode.
		if ( s.ifModified )
			xml.setRequestHeader("If-Modified-Since",
				jQuery.lastModified[s.url] || "Thu, 01 Jan 1970 00:00:00 GMT" );

		// Set header so the called script knows that it's an XMLHttpRequest
		xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");

		// Allow custom headers/mimetypes
		if ( s.beforeSend )
			s.beforeSend(xml);
			
		if ( s.global )
		    jQuery.event.trigger("ajaxSend", [xml, s]);

		// 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 ( !requestDone && xml && (xml.readyState == 4 || isTimeout == "timeout") ) {
				requestDone = true;
				
				// clear poll interval
				if (ival) {
					clearInterval(ival);
					ival = null;
				}
				
				status = isTimeout == "timeout" && "timeout" ||
					!jQuery.httpSuccess( xml ) && "error" ||
					s.ifModified && jQuery.httpNotModified( xml, s.url ) && "notmodified" ||
					"success";

				if ( status == "success" ) {
					// Watch for, and catch, XML document parse errors
					try {
						// process the data (runs the xml through httpData regardless of callback)
						data = jQuery.httpData( xml, s.dataType );
					} catch(e) {
						status = "parsererror";
					}
				}

				// Make sure that the request was successful or notmodified
				if ( status == "success" ) {
					// Cache Last-Modified header, if ifModified mode.
					var modRes;
					try {
						modRes = xml.getResponseHeader("Last-Modified");
					} catch(e) {} // swallow exception thrown by FF if header is not available
	
					if ( s.ifModified && modRes )
						jQuery.lastModified[s.url] = modRes;

					// JSONP handles its own success callback
					if ( !jsonp )
						success();	
				} else
					jQuery.handleError(s, xml, status);

				// Fire the complete handlers
				complete();

				// Stop memory leaks
				if ( s.async )
					xml = null;
			}
		};
		
		if ( s.async ) {
			// don't attach the handler to the request, just poll it instead
			var ival = setInterval(onreadystatechange, 13); 

			// Timeout checker
			if ( s.timeout > 0 )
				setTimeout(function(){
					// Check to see if the request is still happening
					if ( xml ) {
						// Cancel the request
						xml.abort();
	
						if( !requestDone )
							onreadystatechange( "timeout" );
					}
				}, s.timeout);
		}
			
		// Send the data
		try {
			xml.send(s.data);
		} catch(e) {
			jQuery.handleError(s, xml, null, e);
		}
		
		// firefox 1.5 doesn't fire statechange for sync requests
		if ( !s.async )
			onreadystatechange();
		
		// return XMLHttpRequest to allow aborting the request etc.
		return xml;

		function success(){
			// If a local callback was specified, fire it and pass it the data
			if ( s.success )
				s.success( data, status );

			// Fire the global callback
			if ( s.global )
				jQuery.event.trigger( "ajaxSuccess", [xml, s] );
		}

		function complete(){
			// Process result
			if ( s.complete )
				s.complete(xml, status);

			// The request was completed
			if ( s.global )
				jQuery.event.trigger( "ajaxComplete", [xml, s] );

			// Handle the global AJAX counter
			if ( s.global && ! --jQuery.active )
				jQuery.event.trigger( "ajaxStop" );
		}
	},

	handleError: function( s, xml, status, e ) {
		// If a local callback was specified, fire it
		if ( s.error ) s.error( xml, status, e );

		// Fire the global callback
		if ( s.global )
			jQuery.event.trigger( "ajaxError", [xml, s, e] );
	},

	// 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;
	},

	httpData: function( r, type ) {
		var ct = r.getResponseHeader("content-type");
		var xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0;
		var data = xml ? r.responseXML : r.responseText;

		if ( xml && data.documentElement.tagName == "parsererror" )
			throw "parsererror";

		// If the type is "script", eval it in global context
		if ( type == "script" )
			jQuery.globalEval( data );

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