function OnCheckAvailability()
{
if(window.XMLHttpRequest)
{
oRequest = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
oRequest = new ActiveXObject("Microsoft.XMLHTTP");
}

oRequest.open("POST", "http://www.ethbridge.com/kitap/maillist/maillist_form1.asp", true);
oRequest.onreadystatechange = UpdateCheckAvailability;

oRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
oRequest.send("strCmd=availability&email=" + document.form1.email.value);
}

function UpdateCheckAvailability()
{
if(oRequest.readyState == 4)
{ 
if(oRequest.status == 200)
{
document.getElementById("Available").innerHTML = oRequest.responseText;
}
else
{
document.getElementById("Available").innerHTML = "Asychronous Error";
}
}
}