JSON 封装函数

var eventUtil = {
    addHandler:function(element,type,handler) {  //添加句柄
        if(element.addEventListener) {
            element.addEventLisetener(type,handler,false);
        }else if(element.atachEvent) {
            element.atachEvent('on' + type + handler);
        }else {
            element['on' + type] = handler;
        }
    },
    removeHandler:function(element,type,handler) {    //删除句柄
        if(element.removeEventListener) {
            element.removeEventLisetener(type,handler,false);
        }else if(element.detachEvent) {
            element.detachEvent('on' + type + handler);
        }else {
            element['on' + type] = null;
        }
    },
    getEvent:function(event) {    //获取事件
        return event?event:window.event;
    },
    getType:function(event) {    //获取类型
        return event.type;
    },
    getElement:function(event) {  //获取元素目标
        return event.target || event.srcElement;
    },
    preventDefault:function (event) {  //阻止默认事件
        if(event.preventDefault) {
            event.preventDefault();
        }else {
            event.returnValue = false;
        }
    },
    stopPropagation:function(event) {  //阻止事件冒泡
        if(event.stopPropagation) {
            vent.stopPropagation();
        }else {
            event.cancelBubble = true;
        }
    }
}