<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<button id="d1">你好</button>
<script type="text/javascript">
setTimeout(()=>{
// 兼容IE
btn.onclick = function(){
console.log("d1");
}
if(document.all) {
document.getElementById("d1").click();
}
// 兼容其它浏览器
else {
var e = document.createEvent("MouseEvents");
e.initEvent("click", true, true);
document.getElementById("d1").dispatchEvent(e);
}
},3000); // 3秒后执行 */
</script>
</body>
</html>
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