弹出键值说明：
//console.log(ev.keyCode)
//回车：13
//ctrl:17
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>留言提交系统</title> 6 <meta name="author" content="郭菊锋/[email protected]"/> 7 </head> 8 9 <body> 10 <input type="text" name="" id="txt" value="" /> 11 <input type="button" name="" id="btn" value="提交" /><br /> 12 <textarea name="" rows="20" cols="80" id="txtArea"></textarea><br /> 13 </body> 14 </html>
html代码
1 <script type="text/javascript">
2 window.onload = function() {
3 var oTxt = document.getElementById("txt");
4 var oBtn = document.getElementById("btn");
5 var oTxtArea = document.getElementById("txtArea");
6 oBtn.onclick = function() {
7 addTxt();
8 };
9 oTxt.onkeydown = function(ev) {
10 var ev = ev || window.event;
11 //console.log(ev.keyCode)
12 if(ev.keyCode == 13 && ev.keyCode == 17) {
13 addTxt();
14 }
15 if(ev.keyCode == 13) {
16 addTxt();
17 }
18 };
19
20 function addTxt() {
21 if(oTxt.value == "") {
22 alert("请输入内容");
23 }
24 oTxtArea.value = oTxt.value;
25 oTxt.value = "";
26 };
27 }
28 </script>
js
时间： 2024-08-05 14:33:12