<?php
include_once("add.php");
function click(){
if($_POST['username']=="" ||$_POST['title']==""){
echo "<script language='javascript'>";
echo "alert('用户和标题不能为空!')";
echo "</script>";
}
else
echo "发表成功!";
}
?>
<form action="add.php" method="post">
用户:<input type="text" name="username" size="10" /><br/>
标题:<input type="text" name="title"/><br/>
内容:<textarea name="text" rows="5" cols="30"></textarea><p>
<input type="submit" name="submit" value="发表留言" onclick="click()" />
</form>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head><body>
<?php
echo "<script type=\"text/javascript\">\n";
if ($_POST['username'] == '' || $_POST['title'] == '') echo "alert('用户和标题不能为空!')\n";
else echo "alert('发表成功!')\n";
echo "</script>\n";
?>
<form action="add.php" method="post">
用户:<input type="text" name="username" size="10" /><br/>
标题:<input type="text" name="title"/><br/>
内容:<textarea name="text" rows="5" cols="30"></textarea><p>
<input type="submit" name="submit" value="发表留言" />
</form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head><body><?php
echo "<script type=\"text/javascript\">\n";
if ($_POST['username'] == '' || $_POST['title'] == '') echo "alert('用户和标题不能为空!')\n";
else echo "alert('发表成功!')\n";
echo "</script>\n";
?>
<script type="text/javascript">
function validate() {
var username = document.getElementsByTagName('input')[0].value;
var title = document.getElementsByTagName('input')[1].value;
if (username.length < 1 || title.length < 1) {
alert('用户和标题不能为空!');
return false;
}
else return true;
}
</script>
<form action="add.php" method="post" onsubmit="return validate();">
用户:<input type="text" name="username" size="10" /><br/>
标题:<input type="text" name="title"/><br/>
内容:<textarea name="text" rows="5" cols="30"></textarea><p>
<input type="submit" name="submit" value="发表留言" />
</form>
</body>
</html>