function makeHttpObject() {
    try {
        return new XMLHttpRequest();
    }
    catch (error) {
    }
    try {
        return new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (error) {
    }
    try {
        return new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch (error) {
    }

    throw new Error("Could not create HTTP request object.");
}