function postHTTPRequestOject(){
    var xmlhttp=false;
    try{
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e){
        try{
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch(E){
            xmlhttp = false;
        }
    }
    if(!xmlhttp && typeof XMLHttpRequest != 'undefined'){
        xmlhttp = new XMLHttpRequest();
    }
    return xmlhttp;
}
var xmlhttp=postHTTPRequestOject();
function CallBack(){
    if(xmlhttp.readyState==4){
        if(xmlhttp.status==200){
            document.write(xmlhttp.responseText);
        }
    }
}
//method= "POST" hoac "GET"
function ButtonClick(method,page){
    xmlhttp.open(method,page,true);
    xmlhttp.onreadystatechange=CallBack;
    xmlhttp.send(null);
}