$("#输入框id").keyup(function(){
if(event.keyCode == 13){
//这里写你要执行的事件
}
})
扩展资料：JQuery简单的按钮点击和文本框输入事件
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath()
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'test.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="script/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#clickme").click(function(){
alert("Hello World click")
})
$('#clickmebind').bind("click", function(){
alert("Hello World bind")
})
$('#clickmeon').on('click', function(){
alert("Hello World on")
})
})
</script>
<script type="text/javascript">
//使用id的方式获取
$(document).ready(function(){
//1
$("#button_text1").click(function(){
var result1 = $("#input_text1").val()
alert("result1 = " + result1)
})
//2
$("#button_text2").click(function(){
var result2 = $("input[id='input_text2']").val()
alert("result2 = " + result2)
})
//3
$("#button_text3").click(function(){
var result3 = $("input[id='input_text3']").attr("value")
alert("result3 = " + result3)
})
//4. 可以通过type的值来获取input中的值（未演示）
/*
$("#button_text4").click(function(){
var result4 = $("input[type='text']").val()
alert("result4 = " + result4)
})
*/
//5. 可以通过name的值来获取input中的值（未演示）
/*
$("#button_text5").click(function(){
var result5 = $("input[name='text']").val()
alert("result5 = " + result5)
})
*/
})
</script>
</head>
<body>
<h1>根据ID来判定</h1>
<input type="button" name="clickmes" id="clickme" value="click me" />
<input type="button" name="clickmebinds" id="clickmebind" value="clickme_bind" />
<input type="button" name="clickmeons" id="clickmeon" value="clickme_on" />
<!-- 获取文本框的值：方式一 -->
<div id="test1">
<input id="input_text1" type="text" value="test1" style="width: 100px" />
<button id="button_text1">test1</button>
</div>
<!-- 获取文本框的值：方式二 -->
<div id="test2">
<input id="input_text2" type="text" value="test2" style="width: 100px" />
<button id="button_text2">test2</button>
</div>
<!-- 获取文本框的值：方式三 -->
<div id="test3">
<input id="input_text3" type="text" value="test3" style="width: 100px" />
<button id="button_text3">test3</button>
</div>
</body>
</html>
