var xmlHttp;

function showHint()
{
	
var month = document.getElementById("month").value;
var day = document.getElementById("day").value;
var year = document.getElementById("year").value;
var month_to = document.getElementById("month_to").value;
var day_to = document.getElementById("day_to").value;
var year_to = document.getElementById("year_to").value;


xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  } 
var str="month="+month+"&day="+day+"&year="+year+"&month2="+month_to+"&day2="+day_to+"&year2="+year_to;
var url="check.php";
url=url+"?"+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("ajaxBox").innerHTML=xmlHttp.responseText;
 } 
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 // Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}