在html中怎样在注册页面点击注册按钮显示注册成功？？

<script type="text/JavaScript">

var r=confirm("点击注册")

if (r==true)

{

document.write("注册成功")

}

else

{

document.write("注册失败")

}

</script>

确切的说，登陆注册代码，是由2部分组成

首先，是html元素，具体表单元素（注册也好，登陆也好，都需要输入框和按钮提供给用户输入他的信息和提交他的信息）

第二部分：需要服务器端动态语言去处理表单发送来的信息，而这个，由于html是客户端语言，已经html不具备动态解析功能，所以，html是不可能做得到的。这部分就需要诸如但不限于：asp php asp.net jsp等来进行服务器端处理

$uname = $_POST['username']

$pword = $_POST['password']

$uname = htmlspecialchars($uname)

$pword = htmlspecialchars($pword)

$uLength = strlen($uname)

$pLength = strlen($pword)

if ($uLength >= 10 &&$uLength <= 20) {

$errorMessage = ""

}

else {

$errorMessage = $errorMessage . "Username must be between 10 and 20 characters" . "<BR>"

}

if ($pLength >= 8 &&$pLength <= 16) {

$errorMessage = ""

}

else {

$errorMessage = $errorMessage . "Password must be between 8 and 16 characters" . "<BR>"

}

$user_name = "root"

$pass_word = ""

$database = "login"

$server = "127.0.0.1"

$db_handle = mysql_connect($server, $user_name, $pass_word)

$db_found = mysql_select_db($database, $db_handle)

if ($db_found) {

}

$SQL = "SELECT * FROM login WHERE L1 = $uname"

$result = mysql_query($SQL)

$num_rows = mysql_num_rows($result)

if ($num_rows >0) {

$errorMessage = "Username already taken"

}

else {

}

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