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//绑定事件的兼容
function addEventListener(element, type, fn) {
if (element.addEventListener) {
element.addEventListener(type, fn, false)
} else if (element.attachEvent) {
element.attachEvent("on" + type, fn);
} else {
element["on" + type] = fn;
}
} //解绑事件的兼容
function removeEventListener(element, type, fnName) {
if (element.removeEventListener) {
element.removeEventListener(type, fnName, false);
} else if (element.detachEvent) {
element.detachEvent('on' + type, fnName);
} else {
element["on" + type] = null
}
} //测试
function f1() {
console.log("first");
}function f2() {
console.log('second');
}addEventListener(my$('btn1'), 'click', f1);
addEventListener(my$('btn1'), 'click', f2);
my$('btn2').onclick = function () {
removeEventListener(my$('btn1'), 'click', f1)
}
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