jQuery 1.0.4 - New Wave Javascript(js源文件)

                if(event.srcElement)
                    event.target = event.srcElement;

                // calculate pageX/Y
                var e = document.documentElement, b = document.body;
                event.pageX = event.clientX + (e.scrollLeft || b.scrollLeft);
                event.pageY = event.clientY + (e.scrollTop || b.scrollTop);

            // check safari and if target is a textnode
            } else if(jQuery.browser.safari && event.target.nodeType == 3) {
                // target is readonly, clone the event object
                event = jQuery.extend({}, event);
                // get parentnode from textnode
                event.target = event.target.parentNode;
            }

            // fix preventDefault and stopPropagation
            if (!event.preventDefault)
                event.preventDefault = function() {
                    this.returnValue = false;
                };

            if (!event.stopPropagation)
                event.stopPropagation = function() {
                    this.cancelBubble = true;