javascript 事件框架

  

javascript事件模型框架-eventutil.js

 

var EventUtil = new Object;

EventUtil.formatEvent = function (oEvent) {
     //isIE和isWin引用到一个js文件，判断浏览器和操作系统类型
     if (isIE && isWin) {
         oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
         //IE只支持冒泡，不支持捕获
         oEvent.eventPhase = 2;
         oEvent.isChar = (oEvent.charCode > 0);
         oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
         oEvent.pageY = oEvent.clientY + document.body.scrollTop;
         //阻止事件的默认行为
         oEvent.preventDefault = function () {
             this.returnValue = false;
         };

          //将toElement,fromElement转化为标准的relatedTarget
         if (oEvent.type == "mouseout") {
             oEvent.relatedTarget = oEvent.toElement;
         } else if (oEvent.type == "mouseover") {
             oEvent.relatedTarget = oEvent.fromElement;
         }
         //取消冒泡     
         oEvent.stopPropagation = function () {
             this.cancelBubble = true;
         };

         oEvent.target = oEvent.srcElement;
         //添加事件发生时间属性，IE没有
         oEvent.time = (new Date).getTime();
     }
     return oEvent;
};

EventUtil.getEvent = function() {
     if (window.event) {
         //格式化IE的事件
         return this.formatEvent(window.event);
     } else {
         return EventUtil.getEvent.caller.arguments[0];
     }
};