var xmlhttp;
function createHttp()
{
    if(window.ActiveXObject)
    {
        var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
        xmlhttp = new XMLHttpRequest();
    }
    return xmlhttp;
}

function Send()
{
    var ids = document.getElementById('uid').value;
    alert(ids);
    xmlhttp = createHttp();
    xmlhttp.onreadystatechange = Receive;
    var url = 'Ajax.ashx?Ids=' + ids;
    xmlhttp.open('Get',url,true);
    xmlhttp.send(null);
}

function Receive()
{
    if(xmlhttp.readyState == 4)
    {
        if(xmlhttp.status == 200)
        {
             document.gelElementById('txt').value=xmlhttp.responseText;
             alert(xmlhttp.responseText);
        }
     }
}

function AutoRefresh()
{
    setInterval(Send, 5000);
}