for (var i = props.length; i; i–)
event[props[i]] = originalEvent[props[i]];
// Mark it as fixed
event[expando] = true;
// add preventDefault and stopPropagation since
// they will not work on the clone
event.preventDefault = function()
{
// if preventDefault exists run it on the original event
if (originalEvent.preventDefault)
originalEvent.preventDefault();
// otherwise set the returnValue property of the original event to false (IE)
originalEvent.returnValue = false;
};
event.stopPropagation = function()
{
// if stopPropagation exists run it on the original event
if (originalEvent.stopPropagation)
originalEvent.stopPropagation();
// otherwise set the cancelBubble property of the original event to true (IE)
originalEvent.cancelBubble = true;
};
// Fix timeStamp
event.timeStamp = event.timeStamp || now();
// Fix target property, if necessary
if (!event.target)
event.target = event.srcElement || document; // Fixes #1925 where srcElement might not be defined either
// check if target is a textnode (safari)
if (event.target.nodeType == 3)
event.target = event.target.parentNode;
// Add relatedTarget, if necessary
if (!event.relatedTarget && event.fromElement)
event.relatedTarget = event.fromElement == event.target ? event.toElement : event.fromElement;
// Calculate pageX/Y if missing and clientX/Y available
if (event.pageX == null && event.clientX != null)
{
var doc = document.documentElement, body = document.body;
event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) – (doc.clientLeft || 0);
event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) – (doc.clientTop || 0);
}
// Add which for key events
if (!event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode))
event.which = event.charCode || event.keyCode;
// Add metaKey to non-Mac browsers (use ctrl for PC’s and Meta for Macs)
if (!event.metaKey && event.ctrlKey)
event.metaKey = event.ctrlKey;
// Add which for click: 1 == left; 2 == middle; 3 == right
// Note: button is not normalized, so don’t use it
if (!event.which && event.button)
event.which = (event.button & 1 ? 1 : (event.button & 2 ? 3 : (event.button & 4 ? 2 : 0)));
return event;
}
作者：WebFlash
出处：http://webflash.cnblogs.com
