JS-制作留言提交系统(支持ctrl+回车)

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/702004176@qq.com"/>
 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

 

posted @ 2017-05-02 18:57  xing.org1^  阅读(244)  评论(0编辑  收藏  举报