Sending information in url parameters using XmlHttpRequest in get method, how do i retrieve those parameters in aspx page?

I want to retrieve those two parameters which are passed in url

// Read the text file with an XMLHttpRequest

    var xh;
    if (window.XMLHttpRequest) {
        xh = new XMLHttpRequest();
        alert("Object created");
    }
    alert(xh);

    xh.onreadystatechange = function() {

        if (xh.readyState == 4 && xh.status == 200) {
            alert(xh.responseText);
            document.getElementById("d1").innerHTML = xh.responseText;
        }
    }
    xh.open("GET", "Default.aspx?name=Henry&lname=Ford"", true);
    xh.send();

</script>

Now i want to retrieve those two parameters in aspx page.

Code in aspx page-

using System;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
    Response.Write(DateTime.Now);
}
}