function logoutresponse(req)
{
    document.getElementById("pagetitle").innerHTML = req.responseText;
    document.getElementById("loginformheader").innerHTML = "Client Login";
    document.getElementById("loginform").innerHTML = "<form method=\"POST\" name=\"login\"><fieldset><p><label for=\"username\" class=\"top\">Username</label><br /><input type=\"text\" name=\"username\" id=\"username\" tabindex=\"1\" class=\"field\"  value=\"\"  onKeyPress=\"if(event.keyCode==13) LoginReq()\"/></p><span id=\"unblankfields\" style=\"color:#F00;\"></span><p><label for=\"password\" class=\"top\">Password</label><br /><input type=\"password\" name=\"password\" id=\"password\" tabindex=\"1\" class=\"field\" value=\"\" onKeyPress=\"if(event.keyCode==13) LoginReq()\" /></p><span id=\"pwblankfields\" style=\"color:#F00;\"></span><p><input type=\"button\" name=\"submit\" class=\"button\" tabindex=\"1\" value=\"Login\" onClick=\"LoginReq()\"/></p><br /><span id=\"notvaliduser\" style=\"color:#F00;\"></span></fieldset></form>";
// <p><a href=\"javascript:newMenuSel('signup.html')\" id=\"newuser\" >New Customer?</a></p></form>";
}

function customerlogout()
{
        var req = newXMLHttpRequest();
        var callbackhandler = getReadyStateHandler(req, logoutresponse);
        req.onreadystatechange = callbackhandler;
        req.open("POST", "server_logout.php" , true);
        req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
        req.send(null);
}