var xmlhttp
function date_time_buy(tosite, model, ip)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
var url="date_time_buy.php";
url=url+"?tosite="+tosite;
url=url+"&model="+model;
url=url+"&ip="+ip;
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}

function stateChanged()
{
if (xmlhttp.readyState==4)
  {
  document.getElementById("txt").innerHTML=xmlhttp.responseText;  
  }
}