<script>
window.onload=function(){
document.getElementById("enterSubmit").onkeyup=function(e){
e=e||window.event; //获取事件对象
var keycode= e.keyCode || e.which || e.charCode; //获取键码
if(keycode === 13){ //判断键码是否为13(回车键)
alert("回车提交成功");
}
}
}
</script>
<body>
<input type="text" id="enterSubmit" value="回车提交"/>
</body>
来源:https://www.cnblogs.com/web-Knowledge/p/7070554.html