Ben

没什么好说的给出主要代码:

<script language="JavaScript">
 
 function scrollmove() {
    ChatBody.scrollTop = ChatBody.scrollHeight;
  }

 function GetAJAX(){
  var xmlhttp = false;
  var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  xmlhttp.open("POST","response.asp",true);
  xmlhttp.send(null);
  xmlhttp.onreadystatechange=function() {
   if ( xmlhttp.readyState==4 || xmlhttp.readyState==’complete’ ){
    ChatBody.innerHTML = xmlhttp.responseText;
    scrollmove();
   }
  }
 }

 function SendAJAX(){
  if (ChatForm.ChatText1.value != "" && ChatForm.ChatText2.value != ""){
   var DataToSend = "ChatText1=" + ChatForm.ChatText1.value + "&ChatText2=" + ChatForm.ChatText2.value;
   var xmlhttp = false;
   var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
   xmlhttp.open("POST","receive.asp",false);
   xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
   xmlhttp.send(DataToSend);
 
   ChatForm.ChatText2.value = "";
   GetAJAX();
  }
 }
 
 setInterval(’GetAJAX()’, 1000); 
</script>

测试地址: http://www.cnspica.com/demo/ajax/aspchat/chat.asp