JavaScript中的事件委托示范代码

JavaScript中的事件委托演示代码

var addEvent = function (elem, eventType, func) {
    if ( elem.addEventListener )
        addEvent = function (elem, eventType, func) {
            elem.addEventListener(eventType, func, false);
        };
    else if ( elem.attachEvent )
        addEvent = function (elem, eventType, func) {
            elem.attachEvent('on' + eventType, func);
        };
    addEvent(elem, eventType, func);
};
var delegateEvent = function (elem, childElems, eventType, func, args) {
    addEvent(elem, eventType, function (e) {
        var evt = e || window.event;
        var elem = evt.target || evt.srcElement;
        if ( elem.nodeName.toLowerCase() == childElems.toLowerCase() ) {
            func(elem, args);
        }
    });
};