JavaScript事件委托实例分析

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); } }); };