var xhr;
	function getXHR() {
		try {
		xhr=new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
		try {
		xhr=new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e) {
		xhr=false;
		}
	}
if(!xhr&&typeof XMLHttpRequest!='undefined') {
xhr=new XMLHttpRequest();
}
return xhr;
}

function openXHR(method,url,callback) {
getXHR();
xhr.open(method,url);
xhr.onreadystatechange=function() {
if(xhr.readyState!=4)return;
callback(xhr);
}
xhr.send(null);
}


function getfb(xmlDom) { //评论提交后所触发的事件，更新评论列表
var qwbmmsg=document.getElementById("qwbmmsg");
qwbmmsg.innerText=xmlDom.responseText;
loadXML("get","pl_list.asp",getList);
}


//4.提交评论
function fb() { //处理提交

	var b_conter=document.getElementById("b_conter");
	if (b_conter.value.replace(/ /g,"")==""){
		alert("留言内容不能为空");
		b_conter.focus();
		return false;
		}
		else if (b_conter.value.replace(/ /g,"").length < 8){
		alert("留言内容太少了吧，你这是刷屏的吗？\n\n呵呵，请重新输入你的留言。");
		b_conter.focus();
		return false;
		}
		else if (b_conter.value.replace(/ /g,"").length > 500){
		alert("留言内容太多。");
		b_conter.focus();
		return false;
		}
		
	var b_name=document.getElementById("b_name");
	if (b_name.value.replace(/ /g,"")==""){
		alert("留言者的姓名不能为空,请填写你的姓名");
		b_name.focus();
		return false;
		}
		else if (b_name.value.replace(/ /g,"").length<2){
		alert("姓名太短了");
		b_name.focus();
		return false;
		}
		else if (b_name.value.replace(/ /g,"").length>10){
		alert("姓名太长了");
		b_name.focus();
		return false;
		}

	var b_qq=document.getElementById("b_qq");
	if (isNaN(b_qq.value)){
		alert("QQ必须为数字");
		b_qq.focus();
		return false;
		}
	if (b_qq.value.replace(/ /g,"")==""){
		alert("QQ不能为空,请填写你的QQ方便我与你联系");
		b_qq.focus();
		return false;
		}
	if (b_qq.value.replace(/ /g,"").length<5){
		alert("这么短的QQ，你是第一代的QQ用户吗？");
		b_qq.focus();
		return false;
		}
	if (b_qq.value.replace(/ /g,"").length>11){
		alert("这么长的QQ，还没有见过");
		b_qq.focus();
		return false;
		}		
		
	var yianzhen=document.getElementById("yianzhen");
	if (yianzhen.value.replace(/ /g,"")==""){
		alert("验证码不能为空");
		yianzhen.focus();
		return false;
		}
		else if (isNaN(yianzhen.value.replace(/ /g,""))){
		alert("验证码必须为数字，请重新输入验证码");
		yianzhen.focus();
		return false;
		}
	
	document.getElementById("qwbmmsg").style.display = "block";
	document.getElementById("qwbmmengg").style.display = "none";
	document.getElementById("qwbmmengms2").style.display = "none";	
	document.getElementById('qwbmbbutton').disabled='disabled';
	document.getElementById('qwbmbreset').disabled='disabled';
	document.getElementById("qwbmmsg").innerText = "正在发表评论";
	alert("正在发表评论");
	loadXML("get","qwbmajaxadd.asp?b_conter="+b_conter.value+"&b_name="+b_name.value+"&b_qq="+b_qq.value,getfb);
	
}

function loadXML(method,url,callback) {
getXHR();
xhr.open(method,url);
xhr.setRequestHeader("Content-Type","text/xml");
xhr.setRequestHeader("Content-Type","GBK");
xhr.onreadystatechange=function() {
if(xhr.readyState!=4) return;
callback(xhr);
}
xhr.send(null);
}