var objXmlHttp = null;
function CreateXMLHTTP() {
if (window.ActiveXObject) {
objXmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} else {
if (window.XMLHttpRequest) {
objXmlHttp = new XMLHttpRequest();
} else {
alert("初始化XMLHTTP错误！");
}
}
}
function DoComments() {
var data = "txtComments" + document.getElementById("txtComment").value;
CreateXMLHTTP();
objXmlHttp.open("POST", "DealComments.ashx", true);
objXmlHttp.onreadystatechange = function () {//在服务器响应后调用
if (objXmlHttp.readyState >= 4) {
if (objXmlHttp.status == 200) {
var result = objXmlHttp.responseText;//获得服务器返回的字符串
if (result == "true") {
var cTable = document.getElementById("commentTable");//获得评论的表格对象
var newRow = cTable.insertRow(cTable.rows.length);//在表格的最后一行再添加一行
var cTd = newRow.insertCell();//在新添加的行中再添加一列
cTd.innerHTML = document.getElementById("txtComment").value;//设置列内容为刚发布的评论内容
} else {
alert("objXmlHttp.status");
}
}
}
}
objXmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); //添加自定义HTTP头道请求
objXmlHttp.send(data);//发送请求到服务器
}



评论信息：
cellpadding="0" cellspacing="0">

<%----%>

用户名

内容

cellpadding="0" cellspacing="0">

发布内容：

public void ProcessRequest(HttpContext context)
{
string strComment = context.Request.Form["txtComments"];//获得传过来的内容
if (string.IsNullOrEmpty(strComment))//如果不为空，返回ture
{
context.Response.Write("true");
}
else
{
context.Response.Write("false");
}
context.Response.End();
}