Fixed #1781 for warnings created on load by FF javascript.options.strict == true.

src/ajax.js

@@ -246,7 +246,7 @@ jQuery.extend({
 			head.appendChild(script);
 
 			// We handle everything using the script element injection
-			return;
+			return undefined;
 		}
 
 		var requestDone = false;
@@ -362,9 +362,6 @@ jQuery.extend({
 		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 )
@@ -388,6 +385,9 @@ jQuery.extend({
 			if ( s.global && ! --jQuery.active )
 				jQuery.event.trigger( "ajaxStop" );
 		}
+		
+		// return XMLHttpRequest to allow aborting the request etc.
+		return xml;
 	},
 
 	handleError: function( s, xml, status, e ) {

src/core.js

@@ -418,7 +418,8 @@ jQuery.fn = jQuery.prototype = {
 
 			}
 
-		} else
+		}
+
 		return this.each(function(){
 			if ( this.nodeType != 1 )
 				return;
@@ -971,9 +972,9 @@ jQuery.extend({
 							div.childNodes :
 							[];
 				
-					for ( var i = tbody.length - 1; i >= 0 ; --i )
+					for ( var j = tbody.length - 1; j >= 0 ; --j )
-						if ( jQuery.nodeName( tbody[ i ], "tbody" ) && !tbody[ i ].childNodes.length )
+						if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
-							tbody[ i ].parentNode.removeChild( tbody[ i ] );
+							tbody[ j ].parentNode.removeChild( tbody[ j ] );
 					
 					// IE completely kills leading whitespace when innerHTML is used	
 					if ( /^\s/.test( elem ) )	

src/event.js

@@ -170,7 +170,7 @@ jQuery.event = {
 		} else {
 			// don't do events on text and comment nodes
 			if ( element.nodeType == 3 || element.nodeType == 8 )
-				return;
+				return undefined;
 
 			var val, ret, fn = jQuery.isFunction( element[ type ] || null ),
 				// Check to see if we need to provide a fake event, or not
@@ -339,7 +339,8 @@ jQuery.event = {
 						if ( jQuery.browser.msie || document.readyState != "loaded" && document.readyState != "complete" )
 							document.documentElement.doScroll("left");
 					} catch( error ) {
-						return setTimeout( arguments.callee, 0 );
+						setTimeout( arguments.callee, 0 );
+						return;
 					}
 
 					// and execute any waiting functions
@@ -367,17 +368,19 @@ jQuery.event = {
 			setup: function() {
 				if (jQuery.browser.msie) return false;
 				jQuery(this).bind('mouseover', jQuery.event.special.mouseenter.handler);
+				return true;
 			},
 		
 			teardown: function() {
 				if (jQuery.browser.msie) return false;
 				jQuery(this).unbind('mouseover', jQuery.event.special.mouseenter.handler);
+				return true;
 			},
 			
 			handler: function(event) {
 				var args = Array.prototype.slice.call( arguments, 1 );
 				// If we actually just moused on to a sub-element, ignore it
-				if ( withinElement(event, this) ) return;
+				if ( withinElement(event, this) ) return true;
 				// Execute the right handlers by setting the event type to mouseenter
 				event.type = 'mouseenter';
 				// Include the event object as the first argument
@@ -391,17 +394,19 @@ jQuery.event = {
 			setup: function() {
 				if (jQuery.browser.msie) return false;
 				jQuery(this).bind('mouseout', jQuery.event.special.mouseleave.handler);
+				return true;
 			},
 		
 			teardown: function() {
 				if (jQuery.browser.msie) return false;
 				jQuery(this).unbind('mouseout', jQuery.event.special.mouseleave.handler);
+				return true;
 			},
 			
 			handler: function(event) {
 				var args = Array.prototype.slice.call( arguments, 1 );
 				// If we actually just moused on to a sub-element, ignore it
-				if ( withinElement(event, this) ) return false;
+				if ( withinElement(event, this) ) return true;
 				// Execute the right handlers by setting the event type to mouseleave
 				event.type = 'mouseleave';
 				// Include the event object as the first argument
@@ -444,6 +449,7 @@ jQuery.fn.extend({
 	triggerHandler: function( type, data, fn ) {
 		if ( this[0] )
 			return jQuery.event.trigger( type, data, this[0], false, fn );
+		return undefined;
 	},
 
 	toggle: function() {

src/fx.js

@@ -181,7 +181,7 @@ jQuery.fn.extend({
 
 var queue = function( elem, type, array ) {
 	if ( !elem )
-		return;
+		return undefined;
 
 	type = type || "fx";
 

src/offset.js

@@ -85,8 +85,6 @@ jQuery.fn.offset = function() {
 		results = { top: top, left: left };
 	}
 
-	return results;
-
 	function border(elem) {
 		add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") );
 	}
@@ -95,4 +93,6 @@ jQuery.fn.offset = function() {
 		left += parseInt(l) || 0;
 		top += parseInt(t) || 0;
 	}
+
+	return results;
 };