mainly made the code shorter:

- removed some needless if's
- replace multiple "var x" for one, comma separated declaration.
- added a local fn called now() for the (new Date)s
- fixed the indentation of a block, and a typo in a comment.
- used fn instead of prototype where possible
- jquery fx: exposed the speeds hash as jQuery.fx.speeds.

Also fixed (again) line endings

src/ajax.js

@@ -91,7 +91,7 @@ jQuery.each( "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess,ajaxSend".sp
 	};
 });
 
-var jsc = (new Date).getTime();
+var jsc = now();
 
 jQuery.extend({
 	get: function( url, data, callback, type ) {
@@ -211,7 +211,7 @@ jQuery.extend({
 			s.cache = false;
 
 		if ( s.cache === false && s.type.toLowerCase() == "get" ) {
-			var ts = (new Date()).getTime();
+			var ts = now();
 			// try replacing _= if it is there
 			var ret = s.url.replace(/(\?|&)_=.*?(&|$)/, "$1_=" + ts + "$2");
 			// if nothing was replaced, add timestamp to the end
@@ -448,9 +448,9 @@ jQuery.extend({
 	},
 
 	httpData: function( r, type ) {
-		var ct = r.getResponseHeader("content-type");
+		var ct = r.getResponseHeader("content-type"),
-		var xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0;
+			xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
-		var data = xml ? r.responseXML : r.responseText;
+			data = xml ? r.responseXML : r.responseText;
 
 		if ( xml && data.documentElement.tagName == "parsererror" )
 			throw "parsererror";

src/core.js

@@ -10,27 +10,21 @@
  */
 
 // Map over jQuery in case of overwrite
-if ( window.jQuery )
+var _jQuery = window.jQuery,
-	var _jQuery = window.jQuery;
-
-var jQuery = window.jQuery = function( selector, context ) {
-	// The jQuery object is actually just the init constructor 'enhanced'
-	return new jQuery.prototype.init( selector, context );
-};
-
 // Map over the $ in case of overwrite	
-if ( window.$ )
+	_$ = window.$;
-	var _$ = window.$;
 
-// Map the jQuery namespace to the '$' one
+var jQuery = window.jQuery = window.$ = function( selector, context ) {
-window.$ = jQuery;
+	// The jQuery object is actually just the init constructor 'enhanced'
+	return new jQuery.fn.init( selector, context );
+};
 
 // A simple way to check for HTML strings or ID strings
 // (both of which we optimize for)
-var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/;
+var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/,
 
 // Is it a simple selector
-var isSimple = /^.[^:#\[\.]*$/;
+	isSimple = /^.[^:#\[\.]*$/;
 
 jQuery.fn = jQuery.prototype = {
 	init: function( selector, context ) {
@@ -359,9 +353,7 @@ jQuery.fn = jQuery.prototype = {
 	},
 
 	is: function( selector ) {
-		return selector ?
+		return !!selector && jQuery.multiFilter( selector, this ).length > 0;
-			jQuery.multiFilter( selector, this ).length > 0 :
-			false;
 	},
 
 	hasClass: function( selector ) {
@@ -536,7 +528,7 @@ jQuery.fn = jQuery.prototype = {
 };
 
 // Give the init function the jQuery prototype for later instantiation
-jQuery.prototype.init.prototype = jQuery.prototype;
+jQuery.fn.init.prototype = jQuery.fn;
 
 function evalScript( i, elem ) {
 	if ( elem.src )
@@ -553,6 +545,10 @@ function evalScript( i, elem ) {
 		elem.parentNode.removeChild( elem );
 }
 
+function now(){
+	return +new Date;
+}
+
 jQuery.extend = jQuery.fn.extend = function() {
 	// copy reference to target object
 	var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
@@ -598,12 +594,12 @@ jQuery.extend = jQuery.fn.extend = function() {
 	return target;
 };
 
-var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
+var expando = "jQuery" + now(), uuid = 0, windowData = {},
 
 // exclude the following css properties to add px
-var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
+	exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 // cache getComputedStyle
-var getComputedStyle = document.defaultView && document.defaultView.getComputedStyle;
+	getComputedStyle = document.defaultView && document.defaultView.getComputedStyle;
 
 jQuery.extend({
 	noConflict: function( deep ) {
@@ -874,15 +870,15 @@ jQuery.extend({
 			// If the element isn't reporting its values properly in Safari
 			// then some display: none elements are involved
 			else {
-				var swap = [], stack = [];
+				var swap = [], stack = [], a = elem, i = 0;
 
 				// Locate all of the parent display: none elements
-				for ( var a = elem; a && color(a); a = a.parentNode )
+				for ( ; a && color(a); a = a.parentNode )
 					stack.unshift(a);
 
 				// Go through and make them visible, but in reverse
 				// (It would be better if we knew the exact display type that they had)
-				for ( var i = 0; i < stack.length; i++ )
+				for ( ; i < stack.length; i++ )
 					if ( color( stack[ i ] ) ) {
 						swap[ i ] = stack[ i ].style.display;
 						stack[ i ].style.display = "block";
@@ -895,7 +891,7 @@ jQuery.extend({
 					( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
 
 				// Finally, revert the display styles back
-				for ( var i = 0; i < swap.length; i++ )
+				for ( i = 0; i < swap.length; i++ )
 					if ( swap[ i ] != null )
 						stack[ i ].style.display = swap[ i ];
 			}
@@ -946,7 +942,7 @@ jQuery.extend({
 				return;
 
 			if ( elem.constructor == Number )
-				elem = elem.toString();
+				elem += '';
 			
 			// Convert html string into DOM nodes
 			if ( typeof elem == "string" ) {

src/event.js

@@ -13,7 +13,7 @@ jQuery.event = {
 
 		// For whatever reason, IE has trouble passing the window object
 		// around, causing it to be cloned in the process
-		if ( jQuery.browser.msie && elem.setInterval != undefined )
+		if ( jQuery.browser.msie && elem.setInterval )
 			elem = window;
 
 		// Make sure that the function being executed has a unique ID
@@ -51,7 +51,7 @@ jQuery.event = {
 		// event in IE.
 		handle.elem = elem;
 			
-			// Handle multiple events seperated by a space
+		// Handle multiple events separated by a space
 		// jQuery(...).bind("mouseover mouseout", fn);
 		jQuery.each(types.split(/\s+/), function(index, type) {
 			// Namespaced event handlers
@@ -190,7 +190,7 @@ jQuery.event = {
 					target: elem, 
 					preventDefault: function(){}, 
 					stopPropagation: function(){}, 
-					timeStamp: +new Date
+					timeStamp: now()
 				});
 				data[0][expando] = true; // no need to fix fake event
 			}
@@ -309,7 +309,7 @@ jQuery.event = {
 		};
 		
 		// Fix timeStamp
-		event.timeStamp = event.timeStamp || +new Date;
+		event.timeStamp = event.timeStamp || now();
 		
 		// Fix target property, if necessary
 		if ( !event.target )
@@ -380,7 +380,7 @@ jQuery.event = {
 				// If we actually just moused on to a sub-element, ignore it
 				if ( withinElement(event, this) ) return true;
 				// Execute the right handlers by setting the event type to mouseenter
-				arguments[0].type = "mouseenter";
+				event.type = "mouseenter";
 				return jQuery.event.handle.apply(this, arguments);
 			}
 		},
@@ -402,7 +402,7 @@ jQuery.event = {
 				// If we actually just moused on to a sub-element, ignore it
 				if ( withinElement(event, this) ) return true;
 				// Execute the right handlers by setting the event type to mouseleave
-				arguments[0].type = "mouseleave";
+				event.type = "mouseleave";
 				return jQuery.event.handle.apply(this, arguments);
 			}
 		}
@@ -439,9 +439,7 @@ jQuery.fn.extend({
 	},
 
 	triggerHandler: function( type, data, fn ) {
-		if ( this[0] )
+		return this[0] && jQuery.event.trigger( type, data, this[0], false, fn );
-			return jQuery.event.trigger( type, data, this[0], false, fn );
-		return undefined;
 	},
 
 	toggle: function( fn ) {

src/fx.js

@@ -76,10 +76,10 @@ jQuery.fn.extend({
 			if ( this.nodeType != 1)
 				return false;
 
-			var opt = jQuery.extend({}, optall);
+			var opt = jQuery.extend({}, optall), p,
-			var hidden = jQuery(this).is(":hidden"), self = this;
+				hidden = jQuery(this).is(":hidden"), self = this;
 			
-			for ( var p in prop ) {
+			for ( p in prop ) {
 				if ( prop[p] == "hide" && hidden || prop[p] == "show" && !hidden )
 					return jQuery.isFunction(opt.complete) && opt.complete.apply(this);
 
@@ -180,8 +180,7 @@ jQuery.fn.extend({
 });
 
 var queue = function( elem, type, array ) {
-	if ( !elem )
+	if ( elem ){
-		return undefined;
 	
 		type = type || "fx";
 	
@@ -190,6 +189,7 @@ var queue = function( elem, type, array ) {
 		if ( !q || array )
 			q = jQuery.data( elem, type + "queue", jQuery.makeArray(array) );
 
+	}
 	return q;
 };
 
@@ -218,7 +218,7 @@ jQuery.extend({
 
 		opt.duration = (opt.duration && opt.duration.constructor == Number ? 
 			opt.duration : 
-			{ slow: 600, fast: 200 }[opt.duration]) || 400;
+			jQuery.fx.speeds[opt.duration]) || 400;
 	
 		// Queueing
 		opt.old = opt.complete;
@@ -280,7 +280,7 @@ jQuery.fx.prototype = {
 
 	// Start an animation from one number to another
 	custom: function(from, to, unit){
-		this.startTime = (new Date()).getTime();
+		this.startTime = now();
 		this.start = from;
 		this.end = to;
 		this.unit = unit || this.unit || "px";
@@ -343,7 +343,7 @@ jQuery.fx.prototype = {
 
 	// Each step of an animation
 	step: function(gotoEnd){
-		var t = (new Date()).getTime();
+		var t = now();
 
 		if ( gotoEnd || t > this.options.duration + this.startTime ) {
 			this.now = this.end;
@@ -401,7 +401,12 @@ jQuery.fx.prototype = {
 
 };
 
-jQuery.fx.step = {
+jQuery.extend( jQuery.fx, {
+	speeds:{
+		slow: 600,  
+ 		fast: 200  
+	},
+	step: {
 		scrollLeft: function(fx){
 			fx.elem.scrollLeft = fx.now;
 		},
@@ -417,4 +422,5 @@ jQuery.fx.step = {
 		_default: function(fx){
 			fx.elem.style[ fx.prop ] = fx.now + fx.unit;
 		}
-};
+	}
+});

src/selector.js

@@ -114,12 +114,13 @@ jQuery.extend({
 
 			t = jQuery.trim(t);
 
-			var foundToken = false;
+			var foundToken = false,
 
 			// An attempt at speeding up child selectors that
 			// point to a specific element tag
-			var re = quickChild;
+				re = quickChild,
-			var m = re.exec(t);
+				
+				m = re.exec(t);
 
 			if ( m ) {
 				nodeName = m[1].toUpperCase();
@@ -416,8 +417,8 @@ jQuery.extend({
 	},
 
 	dir: function( elem, dir ){
-		var matched = [];
+		var matched = [],
-		var cur = elem[dir];
+			cur = elem[dir];
 		while ( cur && cur != document ) {
 			if ( cur.nodeType == 1 )
 				matched.push( cur );
@@ -449,3 +450,4 @@ jQuery.extend({
 	}
 });
 
+