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我正在開發一個消息系統。我需要將滾動條固定下來，因爲當新數據到達時它應該自動關閉。如何在HTML/CSS中執行此操作 如果這個完整的代碼是不專業的方式..如何修復底部的滾動條？
Home.php
<?php
// Turn off all error reporting
error_reporting(0);
//shop not login users from entering
if(isset($_SESSION['id'])){
$user_id = $_SESSION['id'];
}else{
}
require_once("./inc/connect.inc.php");
?>
<header>
<link rel="stylesheet" href="home - Copy.css" />
<nav>
<h3><a class="h3" href="#">CP</a></h3>
<div><a href="logout.php"><span>Logout</span></a></div>
<div>
<?php
//Start your session
session_start();
//Read your session (if it is set)
if (isset($_SESSION['user_login'])){
echo '<div id="ull">'.strtoupper($_SESSION['user_login']).'</div>';
}
?>
</div>
</nav>
<body>
<div class="shead">
<div class="a1"> <li >Frequent Member</li>
<div class="fm">
<ul>
<?php
//show all the users expect me
$user_id = $_SESSION['id'];
$q = mysql_query("SELECT * FROM `users` WHERE id!='$user_id'");
//display all the results
while($row = mysql_fetch_assoc($q)){
echo " <div class='usernames'>
<a id=\"usernames\" href='home.php?id={$row['id']}'>{$row['username']}</a>
</div>
";
}
?>
</ul>
</div>
</div>
<div class="a2"> <li >Site's Popular in Your College</li></div>
</div>
</header>
<div class="rss">
<?php
// include('rssclass.php');
//include('rss.php');
?>
</div>
<div class="message-right">
<!-- display message -->
<div class="display-message">
<?php
//check $_GET['id'] is set
if(isset($_GET['id'])){
$user_two = trim(mysql_real_escape_string($_GET['id']));
//check $user_two is valid
$q = mysql_query("SELECT `id` FROM `users` WHERE id='$user_two' AND id!='$user_id'");
//valid $user_two
if(mysql_num_rows($q) == 1){
//check $user_id and $user_two has conversation or not if no start one
$conver = mysql_query("SELECT * FROM conversation WHERE (user_one='$user_id' AND user_two='$user_two') OR (user_one='$user_two' AND user_two='$user_id')");
//they have a conversation
if(mysql_num_rows($conver) == 1){
//fetch the converstaion id
$fetch = mysql_fetch_assoc($conver);
$conversation_id = $fetch['id'];
}else{ //they do not have a conversation
//start a new converstaion and fetch its id
$q = mysql_query("INSERT INTO `conversation` VALUES ('','$user_id',$user_two)");
$conversation_id = mysql_insert_id($con);
}
}else{
die("Invalid $_GET ID.");
}
}else {
die("Click On the Person to start Chating.");
}
?>
</div>
<script type="text/javascript">
var objDiv = document.getElementById("display-message");
objDiv.scrollTop = objDiv.scrollHeight;
</script>
<div class="send-message">
<!-- store conversation_id, user_from, user_to so that we can send send this values to post_message_ajax.php -->
<input type="hidden" id="conversation_id" value="<?php echo base64_encode($conversation_id); ?>">
<input type="hidden" id="user_form" value="<?php echo base64_encode($user_id); ?>">
<input type="hidden" id="user_to" value="<?php echo base64_encode($user_two); ?>">
<div class="textbox">
<input class="t_box" type="text" id="message" placeholder="Enter Your Message"/>
<button class="t_btn" id="reply">Reply</button>
<span id="error"></span>
</div>
</div>
</div>
<!--
<div class="textbox">
<form action="#" method="post">
<input type="text" name="msg_body" class="t_box" id="t_box" >
<input type="submit" class="t_btn" id="t_btn" name="submit" value="Send">
</form>
</div>-->
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/script.js"></script>
</body>
Getmsg.php
<?php
require_once("./inc/connect.inc.php");
if(isset($_GET['c_id'])){
//get the conversation id and
$conversation_id = base64_decode($_GET['c_id']);
//fetch all the messages of $user_id(loggedin user) and $user_two from their conversation
$q = mysql_query("SELECT * FROM `messages` WHERE conversation_id='$conversation_id'");
//check their are any messages
if(mysql_num_rows($q) > 0){
while ($m = mysql_fetch_assoc($q)) {
//format the message and display it to the user
$user_form = $m['user_from'];
$user_to = $m['user_to'];
$message = $m['message'];
//get name and image of $user_form from `user` table
$user = mysql_query("SELECT username FROM `users` WHERE id='$user_form'");
$user_fetch = mysql_fetch_assoc($user);
$user_form_username = $user_fetch['username'];
//display the message
echo "
<div class='message'>
<div class='text-con'>
<a href='#''>{$user_form_username}:</a>
<p> {$message}<p>
</div>
</div>
<hr>";
}
}else{
echo "No Messages";
}
}
？>
你能提供一些代碼來顯示你已經嘗試過嗎？ – rblarsen
@rblarsen在那裏它是 –
我認爲這個解決方案不是基於CSS，而是基於JS，所以你可以提供標記和一些你的JS腳本嗎？ – Aroniaina