<!DOCTYPE html>
<html>
<head>
<title>事件流</title>
<mete charset="utf-8"></mete>
</head>
<body>
<script type="text/javascript">
function jw(){
alert("第二种");
}
var bth2=document.getElementByid("bth2");
bth2.onclick=function(){
alert("DOMe0方法")
};
</script>
<div id="box">
<input type="button" value="按钮" id="btn" onclick="alert('hello')" >
<input type="button" value="按钮1" id="bth1" onclick="jw()">
<input type="button" value="按钮2" id="bth2">
</div>
</body>
</html>
meta不是mete
去掉</mete>