利用Microsoft.XMLHTTP定制页面无刷新自动检索提示信息

页面脚本:

var guid = "null";
function CheckMessage()
{
    var obj = guid;
     var nn = Math.floor( Math.random() * 2000000);
//显示信息页面
    var url = "MessageInfo.aspx?time="+nn+"&code=";
    if(obj != "null")
    {
       url = url + obj;
       guid = "null";
       OpenPasswordWin(url,300,500);
       document.getElementById("divMessage").innerHTML = "";      
    }   
}
//检查是否有新的消息
 function YouHadNewMessage(){
    var Had = false;
//空白执行检索页面
    url = "CheckMessage.aspx";
    var nn = Math.floor( Math.random() * 2000000);
    url += "?time="+nn;
    var httpRequest;
    if (typeof XMLHttpRequest != 'undefined') {
        httpRequest = new XMLHttpRequest();
    }
    else if (typeof ActiveXObject != 'undefined') {
        httpRequest = new ActiveXObject('Microsoft.XMLHTTP');
    }
    if (httpRequest) {
        httpRequest.open('GET', url, false);
        httpRequest.send(null);
        if(httpRequest.status == 200){
            var textInfo = httpRequest.responseText;
            if(textInfo != "null") Had = true;
    }}
    if(Had){
   
       guid = textInfo;     
       document.getElementById("divMessage").innerHTML = "<a href='#' title='查看站内短信' onclick='CheckMessage()' id='ss7'><font color=white>-</font></a><bgsound src='/images/newMessage.wav'  border='0'>";
    }
    else
    {       
        document.getElementById("divMessage").innerHTML = "";
    }      
    setTimeout("YouHadNewMessage()",300000);
}
setTimeout("YouHadNewMessage()",300000);