<html>
<head>
<title>javascript实现聊天窗口滚动条总在最下面的方法</title>
<script language="javascript">
function addMessage(message){
var chatArea=document.getElementById("chatArea");
chatArea.innerHTML += message+ '<br />';
chatArea.scrollTop = chatArea.scrollHeight;
}
function sendMessage(){
var msg=document.getElementById("msg").value;
addMessage(msg);
}
</script>
</head>
<body>
<div id="chatArea" style="overflow:auto; height: 120px; width: 450px; border: 1px solid #666;"></div>
<input type="text" name="msg" id="msg"/><input type="button" value="发送消息" onclick="sendMessage();
"/>
</body>
</html>
