javascript学习笔记(五)－－事件

var EventUtil = new Object;
EventUtil.addEventHandler = function (oTarget, sEventType, fnHandler) {
if (oTarget.addEventListener) {
oTarget.addEventListener(sEventType, fnHandler, false);
} else if (oTarget.attachEvent) {
oTarget.attachEvent("on" + sEventType, fnHandler);
} else {
oTarget["on" + sEventType] = fnHandler;
}
};

EventUtil.removeEventHandler = function (oTarget, sEventType, fnHandler) {
if (oTarget.removeEventListener) {
oTarget.removeEventListener(sEventType, fnHandler, false);
} else if (oTarget.detachEvent) {
oTarget.detachEvent("on" + sEventType, fnHandler);
} else {
oTarget["on" + sEventType] = null;
}
};

EventUtil.formatEvent = function (oEvent) {
if (isIE && isWin) {
oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
oEvent.eventPhase = 2;
oEvent.isChar = (oEvent.charCode > 0);
oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
oEvent.pageY = oEvent.clientY + document.body.scrollTop;
oEvent.preventDefault = function () {
this.returnValue = false;
};

if (oEvent.type == "mouseout") {
oEvent.relatedTarget = oEvent.toElement;
} else if (oEvent.type == "mouseover") {
oEvent.relatedTarget = oEvent.fromElement;
}

oEvent.stopPropagation = function () {
this.cancelBubble = true;
};

oEvent.target = oEvent.srcElement;
oEvent.time = (new Date).getTime();
}
return oEvent;
};

EventUtil.getEvent = function() {
if (window.event) {
return this.formatEvent(window.event);
} else {
return EventUtil.getEvent.caller.arguments[0];
}
};

转自:http://www.blogjava.net/ilovezmh/archive/2007/04/18/111430.html