<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Document</title>
</head>
<body>
<button id="action-btn">123</button>
<script>
function addListener(target, type, handler) {
if (target.addEventListener) {
target.addEventListener(type, handler, false);
} else if (target.attachEvent) {
target.attachEvent("on" + type, handler);
} else {
target["on" + type] = handler;
}
}
function doSomething() {
//代码
console.log("show");
}
var btn = document.getElementById("action-btn");
addListener(btn, "click", doSomething);
</script>
</body>
</html>
