var xmlhttp;
if (window.XMLHttpRequest) {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
    // code for IE6, IE5
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else {
}
xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4) {
        document.getElementById("div_blog").innerHTML = xmlhttp.responseText;
    }
}
xmlhttp.open("GET", "yfcblog/RecentBlog.aspx", true);
xmlhttp.send(null);