jquery.js

jQuery即学即用

		/^(\[) *@?([\w-]+) *([!*$^~=]*) *('?"?)(.*?)\4 *\]/,

		// Match: :contains('foo')
		/^(:)([\w-]+)\("?'?(.*?(\(.*?\))?[^(]*?)"?'?\)/,

		// Match: :even, :last-chlid, #id, .class
		new RegExp("^([:.#]*)(" + chars + "+)")
	],

	multiFilter: function( expr, elems, not ) {
		var old, cur = [];

		while ( expr && expr != old ) {
			old = expr;
			var f = jQuery.filter( expr, elems, not );
			expr = f.t.replace(/^\s*,\s*/, "" );
			cur = not ? elems = f.r : jQuery.merge( cur, f.r );
		}

		return cur;
	},

	find: function( t, context ) {
		// Quickly handle non-string expressions
		if ( typeof t != "string" )
			return [ t ];

		// Make sure that the context is a DOM Element
		if ( context && !context.nodeType )
			context = null;

		// Set the correct context (if none is provided)
		context = context || document;

		// Initialize the search
		var ret = [context], done = [], last;

		// Continue while a selector expression exists, and while
		// we're no longer looping upon ourselves
		while ( t && last != t ) {
			var r = [];
			last = t;

			t = jQuery.trim(t);

			var foundToken = false;

			// An attempt at speeding up child selectors that
			// point to a specific element tag
			var re = quickChild;
			var m = re.exec(t);

			if ( m ) {
				var nodeName = m[1].toUpperCase();

				// Perform our own iteration and filter
				for ( var i = 0; ret[i]; i++ )
					for ( var c = ret[i].firstChild; c; c = c.nextSibling )
						if ( c.nodeType == 1 && (nodeName == "*" || c.nodeName.toUpperCase() == nodeName.toUpperCase()) )
							r.push( c );

				ret = r;
				t = t.replace( re, "" );
				if ( t.indexOf(" ") == 0 ) continue;
				foundToken = true;
			} else {
				re = /^([>+~])\s*(\w*)/i;

				if ( (m = re.exec(t)) != null ) {
					r = [];

					var nodeName = m[2], merge = {};
					m = m[1];

					for ( var j = 0, rl = ret.length; j < rl; j++ ) {
						var n = m == "~" || m == "+" ? ret[j].nextSibling : ret[j].firstChild;
						for ( ; n; n = n.nextSibling )
							if ( n.nodeType == 1 ) {
								var id = jQuery.data(n);

								if ( m == "~" && merge[id] ) break;
								
								if (!nodeName || n.nodeName.toUpperCase() == nodeName.toUpperCase() ) {
									if ( m == "~" ) merge[id] = true;
									r.push( n );
								}
								
								if ( m == "+" ) break;
							}
					}

					ret = r;

					// And remove the token
					t = jQuery.trim( t.replace( re, "" ) );
					foundToken = true;
				}
			}

			// See if there's still an expression, and that we haven't already
			// matched a token
			if ( t && !foundToken ) {
				// Handle multiple expressions
				if ( !t.indexOf(",") ) {
					// Clean the result set
					if ( context == ret[0] ) ret.shift();

					// Merge the result sets
					done = jQuery.merge( done, ret );

					// Reset the context
					r = ret = [context];

					// Touch up the selector string
					t = " " + t.substr(1,t.length);

				} else {
					// Optimize for the case nodeName#idName
					var re2 = quickID;
					var m = re2.exec(t);
					
					// Re-organize the results, so that they're consistent
					if ( m ) {
					   m = [ 0, m[2], m[3], m[1] ];

					} else {
						// Otherwise, do a traditional filter check for
						// ID, class, and element selectors
						re2 = quickClass;
						m = re2.exec(t);
					}

					m[2] = m[2].replace(/\\/g, "");

					var elem = ret[ret.length-1];

					// Try to do a global search by ID, where we can
					if ( m[1] == "#" && elem && elem.getElementById && !jQuery.isXMLDoc(elem) ) {
						// Optimization for HTML document case
						var oid = elem.getElementById(m[2]);
						
						// Do a quick check for the existence of the actual ID attribute
						// to avoid selecting by the name attribute in IE
						// also check to insure id is a string to avoid selecting an element with the name of 'id' inside a form
						if ( (jQuery.browser.msie||jQuery.browser.opera) && oid && typeof oid.id == "string" && oid.id != m[2] )
							oid = jQuery('[@id="'+m[2]+'"]', elem)[0];

						// Do a quick check for node name (where applicable) so
						// that div#foo searches will be really fast
						ret = r = oid && (!m[3] || jQuery.nodeName(oid, m[3])) ? [oid] : [];
					} else {
						// We need to find all descendant elements
						for ( var i = 0; ret[i]; i++ ) {
							// Grab the tag name being searched for
							var tag = m[1] == "#" && m[3] ? m[3] : m[1] != "" || m[0] == "" ? "*" : m[2];

							// Handle IE7 being really dumb about <object>s
							if ( tag == "*" && ret[i].nodeName.toLowerCase() == "object" )
								tag = "param";

							r = jQuery.merge( r, ret[i].getElementsByTagName( tag ));
						}

						// It's faster to filter by class and be done with it
						if ( m[1] == "." )
							r = jQuery.classFilter( r, m[2] );

						// Same with ID filtering
						if ( m[1] == "#" ) {
							var tmp = [];

							// Try to find the element with the ID
							for ( var i = 0; r[i]; i++ )
								if ( r[i].getAttribute("id") == m[2] ) {
									tmp = [ r[i] ];
									break;
								}

							r = tmp;
						}

						ret = r;
					}

					t = t.replace( re2, "" );
				}

			}

			// If a selector string still exists
			if ( t ) {
				// Attempt to filter it
				var val = jQuery.filter(t,r);
				ret = r = val.r;
				t = jQuery.trim(val.t);
			}
		}

		// An error occurred with the selector;
		// just return an empty set instead
		if ( t )
			ret = [];

		// Remove the root context
		if ( ret && context == ret[0] )
			ret.shift();

		// And combine the results
		done = jQuery.merge( done, ret );

		return done;
	},

	classFilter: function(r,m,not){
		m = " " + m + " ";
		var tmp = [];
		for ( var i = 0; r[i]; i++ ) {
			var pass = (" " + r[i].className + " ").indexOf( m ) >= 0;
			if ( !not && pass || not && !pass )
				tmp.push( r[i] );
		}
		return tmp;
	},

	filter: function(t,r,not) {
		var last;

		// Look for common filter expressions
		while ( t  && t != last ) {
			last = t;

			var p = jQuery.parse, m;

			for ( var i = 0; p[i]; i++ ) {
				m = p[i].exec( t );

				if ( m ) {
					// Remove what we just matched
					t = t.substring( m[0].length );

					m[2] = m[2].replace(/\\/g, "");
					break;
				}
			}

			if ( !m )
				break;

			// :not() is a special case that can be optimized by
			// keeping it out of the expression list
			if ( m[1] == ":" && m[2] == "not" )
				r = jQuery.filter(m[3], r, true).r;

			// We can get a big speed boost by filtering by class here
			else if ( m[1] == "." )
				r = jQuery.classFilter(r, m[2], not);

			else if ( m[1] == "[" ) {
				var tmp = [], type = m[3];
				
				for ( var i = 0, rl = r.length; i < rl; i++ ) {
					var a = r[i], z = a[ jQuery.props[m[2]] || m[2] ];
					
					if ( z == null || /href|src|selected/.test(m[2]) )
						z = jQuery.attr(a,m[2]) || '';

					if ( (type == "" && !!z ||
						 type == "=" && z == m[5] ||
						 type == "!=" && z != m[5] ||
						 type == "^=" && z && !z.indexOf(m[5]) ||
						 type == "$=" && z.substr(z.length - m[5].length) == m[5] ||
						 (type == "*=" || type == "~=") && z.indexOf(m[5]) >= 0) ^ not )
							tmp.push( a );
				}
				
				r = tmp;

			// We can get a speed boost by handling nth-child here
			} else if ( m[1] == ":" && m[2] == "nth-child" ) {
				var merge = {}, tmp = [],
					test = /(\d*)n\+?(\d*)/.exec(
						m[3] == "even" && "2n" || m[3] == "odd" && "2n+1" ||
						!/\D/.test(m[3]) && "n+" + m[3] || m[3]),
					first = (test[1] || 1) - 0, last = test[2] - 0;

				for ( var i = 0, rl = r.length; i < rl; i++ ) {
					var node = r[i], parentNode = node.parentNode, id = jQuery.data(parentNode);

					if ( !merge[id] ) {
						var c = 1;

						for ( var n = parentNode.firstChild; n; n = n.nextSibling )
							if ( n.nodeType == 1 )
								n.nodeIndex = c++;

						merge[id] = true;
					}

					var add = false;

					if ( first == 1 ) {
						if ( last == 0 || node.nodeIndex == last )
							add = true;
					} else if ( (node.nodeIndex + last) % first == 0 )
						add = true;

					if ( add ^ not )
						tmp.push( node );
				}

				r = tmp;

			// Otherwise, find the expression to execute
			} else {
				var f = jQuery.expr[m[1]];
				if ( typeof f != "string" )
					f = jQuery.expr[m[1]][m[2]];

				// Build a custom macro to enclose it
				f = eval("false||function(a,i){return " + f + "}");

				// Execute it against the current filter
				r = jQuery.grep( r, f, not );
			}
		}

		// Return an array of filtered elements (r)
		// and the modified expression string (t)
		return { r: r, t: t };
	},

	dir: function( elem, dir ){
		var matched = [];
		var cur = elem[dir];
		while ( cur && cur != document ) {
			if ( cur.nodeType == 1 )
				matched.push( cur );
			cur = cur[dir];
		}
		return matched;
	},
	
	nth: function(cur,result,dir,elem){
		result = result || 1;
		var num = 0;

		for ( ; cur; cur = cur[dir] )
			if ( cur.nodeType == 1 && ++num == result )
				break;

		return cur;
	},
	
	sibling: function( n, elem ) {
		var r = [];

		for ( ; n; n = n.nextSibling ) {
			if ( n.nodeType == 1 && (!elem || n != elem) )
				r.push( n );
		}

		return r;
	}
});
/*
 * A number of helper functions used for managing events.
 * Many of the ideas behind this code orignated from 
 * Dean Edwards' addEvent library.
 */
jQuery.event = {

	// Bind an event to an element
	// Original by Dean Edwards
	add: function(element, type, handler, data) {
		// For whatever reason, IE has trouble passing the window object
		// around, causing it to be cloned in the process
		if ( jQuery.browser.msie && element.setInterval != undefined )
			element = window;

		// Make sure that the function being executed has a unique ID
		if ( !handler.guid )
			handler.guid = this.guid++;
			
		// if data is passed, bind to handler 
		if( data != undefined ) { 
        		// Create temporary function pointer to original handler 
			var fn = handler; 

			// Create unique handler function, wrapped around original handler 
			handler = function() { 
				// Pass arguments and context to original handler 
				return fn.apply(this, arguments); 
			};

			// Store data in unique handler 
			handler.data = data;

			// Set the guid of unique handler to the same of original handler, so it can be removed 
			handler.guid = fn.guid;
		}

		// Namespaced event handlers
		var parts = type.split(".");
		type = parts[0];
		handler.type = parts[1];

		// Init the element's event structure
		var events = jQuery.data(element, "events") || jQuery.data(element, "events", {});
		
		var handle = jQuery.data(element, "handle") || jQuery.data(element, "handle", function(){
			// returned undefined or false
			var val;

			// Handle the second event of a trigger and when
			// an event is called after a page has unloaded
			if ( typeof jQuery == "undefined" || jQuery.event.triggered )
				return val;
			
			val = jQuery.event.handle.apply(element, arguments);
			
			return val;
		});

		// Get the current list of functions bound to this event
		var handlers = events[type];

		// Init the event handler queue
		if (!handlers) {
			handlers = events[type] = {};	
			
			// And bind the global event handler to the element
			if (element.addEventListener)
				element.addEventListener(type, handle, false);
			else
				element.attachEvent("on" + type, handle);
		}

		// Add the function to the element's handler list
		handlers[handler.guid] = handler;

		// Keep track of which events have been used, for global triggering
		this.global[type] = true;
	},

	guid: 1,
	global: {},

	// Detach an event or set of events from an element
	remove: function(element, type, handler) {
		var events = jQuery.data(element, "events"), ret, index;

		// Namespaced event handlers
		if ( typeof type == "string" ) {
			var parts = type.split(".");
			type = parts[0];
		}

		if ( events ) {
			// type is actually an event object here
			if ( type && type.type ) {
				handler = type.handler;
				type = type.type;
			}