1、直接上代码很直观
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="js/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<p>
<button id="change" type="button">点击事件</button>
</p>
<script type="text/javascript">
$(function() {
setTimeout(function() {
var buy = document.getElementById('change');
buy.click();
}, 200);
});
$("#change").click(function(){
console.log("八戒你瘦了！")
})
</script>
</body>
</html>