asp.net中用ajax实现客户端保存？

asp.net中用ajax实现客户端保存？ - Web 开发 / Ajax
asp.net中用ajax实现客户端保存事例。例如点击checkbox。在js脚本触发onclick。保存数据到数据库，哪位大侠给个事例

[解决办法]

JScript code

<script>var xmlHttp;function createXmlRequest() {    if(window.ActiveXObject){          var xmlHttps=["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp4.0",                        "MSXML2.XMLHttp3.0","MSXML2.XMLHttp","Microsoft.XMLHTTP"];    try{        for(var i=0;i<xmlHttps.length;i++){               var xmlHttp=new ActiveXObject(xmlHttps[i]);               return xmlHttp;        }     }     catch (error){      }                }    else{        var xmlHttp=new XMLHttpRequest();        return xmlHttp;    }          throw    new Error("失败");}           function insert(){     xmlHttp=createXmlRequest();     xmlHttp.onreadystatechange=handleStateChange;     xmlHttp.open("GET","Handler.ashx?user="+document.getElementById("txtUser").value+"",true);     xmlHttp.send(null);}function handleStateChange(){    if(xmlHttp.readyState==4){         if(xmlHttp.responseText=="Y")alert("success");         else alert("faile");    }}</script><input type="text" id="txtUser" /><input type="button" id="d" onclick="test();" />