在聊天室如果一个人说话的频率太快了如何让其，等待两秒或者说平均两秒说一句话。如何实现。真的没有分了，兄弟们帮帮忙吧

Question

function sub()
        {
            var dx=document.getElementById("dx").value;
            if(dx=="" || dx=="全体伙伴")
            {
                xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
                var nr=document.getElementById("txt").value;
                if(nr=="")
                {
                  return alert('---<-请输入内容->---');
                }
                else
                {
                  xmlhttp.onreadystatechange=stateChange;
                  xmlhttp.open("POST","Default5.aspx?nr="+escape(nr),true);
                  xmlhttp.send(null);
                  document.getElementById("txt").value="";
                }
            }
            else if(dx!="" || dx!="全体对象")
            {
                var qq=document.getElementById("qq");
                var sl=document.getElementById("sl");
                sl.value=true;
                qq.value=true;
                xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
                var nr2=document.getElementById("txt").value;
                if(nr2=="")
                {
                  return alert('---<-请输入内容->---');
                }
                else
                {
                  xmlhttp.onreadystatechange=stateChange2;
                  xmlhttp.open("POST","Default5.aspx?nr="+escape(nr2),true);
                  xmlhttp.send(null);
                  document.getElementById("txt").value="";
                }
            } 
        }
        function stateChange()
        {
            var va=document.getElementById("div_chat");
            if(xmlhttp.readystate==4 && xmlhttp.status==200)
            {
                document.getElementById("div_chat").innerText+=xmlhttp.responseText;
            }
            va.scrollTop=va.scrollHeight;
        }这个是我的聊天信息发送如何更改判断其两秒钟发一句话。

Answer 1

点击提交后  按键变为不可用  然后 settimeout 2秒后 把button变为可用