fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <script> function displayResult(){ var x=document.getElementById("pwd").maxLength; alert(x); } </script> </head> <body> <form> 密码: <input type="password" id="pwd" maxlength="8"> </form> <button type="button" onclick="displayResult()">显示允许输入的最多字符数</button> </body> </html>
运行结果