JavaScript 实现字数统计
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>测试文件</title>
<script>
function cal_words(){
var length = document.getElementById("test").value.length;
document.getElementById("num").innerHTML = length;} </script> </head> <body> <div class="reply"> <textarea id="test" onKeyUp="cal_words()"></textarea> <div>字数：<span id="num">0</span></div> </div> </body> </html>