作业代码：
实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>用户注册</title> </head> <body> <form action="" method="post"> <table align="center" border="0" cellspacing="0" cellpadding="10" width="400" bgcolor="#FFE5CD"> <caption><h3>用户注册</h3></caption> <tr><td colspan="2"><hr></td></tr> <tr> <td width="60" align="right">邮箱:</td> <td width="320" align="left"> <input type="text" name="mail" value="" placeholder="请输入邮箱地址" width="320" size="30"> </td> </tr> <tr> <td align="right">密码:</td> <td> <input type="password" name="password" width="200" align="left" placeholder="字母+数字不能超过16位" size="30" > </td> </tr> <tr> <td align="right">性别:</td> <td> <input type="radio" name="sex" value="male">男 <input type="radio" name="sex" value="female">女 <input type="radio" name="sex" value="secret" checked="">保密 </td> </tr> <tr> <td align="right">兴趣:</td> <td> <input type="checkbox" name="hobby[]" value="hmtl" checked="">HTML <input type="checkbox" name="hobby[]" value="css" >CSS <input type="checkbox" name="hobby[]" value="js" >JS <input type="checkbox" name="hobby[]" value="php" >PHP </td> </tr> <tr> <td align="right">职业:</td> <td> <select name="occupation" > <option value="1" selected="">学生</option> <option value="2">工人</option> <option value="3">白领</option> </select> </td> </tr> <tr> <td align="right">头像:</td> <td align="center"> <input type="file" name="photo" accept="../mage/*.*"> </td> </tr> <tr> <td align="right">备注:</td> <td> <textarea name="comment" cols="40" rows="5" placeholder="字数不能少于10个字"></textarea> </td> </tr> <tr> <td colspan="2" align="center"> <hr> <input type="submit" name="submit" value="提交"> <input type="submit" name="submit" value="重填"> </td> </tr> </table> </form> </body> </html>
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