$("#輸入框id").keyup(function(){
if(event.keyCode == 13){
//這裏寫妳要執行的事件;
}
});
擴展資料：
JQuery簡單的按鈕點擊和文本框輸入事件
<%@ 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的方式獲取
$(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. 可以通過type的值來獲取input中的值（未演示）
/*
$("#button_text4").click(function(){
var result4 = $("input[type='text']").val();
alert("result4 = " + result4);
});
*/
//5. 可以通過name的值來獲取input中的值（未演示）
/*
$("#button_text5").click(function(){
var result5 = $("input[name='text']").val();
alert("result5 = " + result5);
});
*/
});
</script>
</head>
<body>
<h1>根據ID來判定</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" />
<!-- 獲取文本框的值：方式壹 -->
<div id="test1">
<input id="input_text1" type="text" value="test1" style="width: 100px;" />
<button id="button_text1">test1</button>
</div>
<!-- 獲取文本框的值：方式二 -->
<div id="test2">
<input id="input_text2" type="text" value="test2" style="width: 100px;" />
<button id="button_text2">test2</button>
</div>
<!-- 獲取文本框的值：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>