Validate form Javascript 1
RUN
<!DOCTYPE html> <html> <head> <title>Học javascript tại freetuts.net</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="all.js"></script> <style> span{ color:red; display: block; padding: 5px 0px; } </style> </head> <body style="margin: 50px;"> <form method="post" action="" id="loginform"> <table border="1" cellpadding="10"> <tr> <td>Tên đăng nhập: </td> <td> <input type="text" id="username" name="username" value=""/> <span id="username_error"></span> </td> </tr> <tr> <td>Mật khẩu: </td> <td> <input type="text" id="password" name="password" value=""/> <span id="password_error"></span> </td> </tr> <tr> <td>Nhập lại mật khẩu: </td> <td> <input type="text" id="repassword" name="repassword" value=""/> <span id="repassword_error"></span> </td> </tr> <tr> <td>Phone: </td> <td> <input type="text" id="phone" name="phone" value=""/> <span id="phone_error"></span> </td> </tr> <tr> <td>Email </td> <td> <input type="text" id="email" name="email" value=""/> <span id="email_error"></span> </td> </tr> <tr> <td>Địa chỉ </td> <td> <input type="text" id="address" name="address" value=""/> <span id="address_error"></span> </td> </tr> <tr> <td></td> <td> <input type="submit" onclick="return validate();" id="btn" name="btn" value="Đăng ký"/> </td> </tr> </table> </form> </body> </html>
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