JavaScript跨浏览器事件处理程序、事件对象

电玩女神 2022-05-29 14:07 356阅读 0赞

var EventUtil = {
    addHandler:function(element,type,handler){
        if(element.addEventListener){
            element.addEventListener(type,handler,false);
        }
        else if(element.attachEvent){
            element.attachEvent("on"+type,handler);
        }
        else{
            element["on"+type] =handler;
        }
    },
    removeHandler:function(element,type,handler){
        if(element.removeEventListener){
            element.removeEventListener(type,handler,false);
        }
        else if(element.detachEvent){
            element.detachEvent("on" + type,handler);
        }
        else{
            element["on"+type] = null;
        }
    },
    getEvent:function(event){
        return event ? event : window.event;
    },
    getTarget:function(event){
        return event.target || event.srcElement;
    },
    preventDefault:function(event){
        if(event.preventDefault){
            event.preventDefault();
        }
        else{
            event.returnValue = false;
        }
    },
    stopPropagation:function(event){
        if(event.stopPropagation){
            event.stopPropagation();
        }
        else{
            event.cancelBubble = true;
        }
    }
}