// JavaScript Document
var xmlhttp3;
function check()
{
		   var year=document.getElementById("ddlYear").value;
		   var month=document.getElementById("ddlMonth").value;
		
		   if(month.length<1)
			{
				alert("Plaese Select a Month");
				document.getElementById("ddlMonth").focus();
			return false;
			}
		   if(year.length<1)
			{
			alert("Plaese Select a Year");
			document.getElementById("ddlYear").focus();
			return false;
			}
           
		   if(month.length<1 || year.length<1)
            {
               document.getElementById("hdData").innerHTML="";
               return;
            }
           xmlhttp3=GetXmlHttpObject();
           if(xmlhttp3==null)
            {
               alert("Your browser does not support XMLHTTP!");
               return;
            }
           var url="check.php";
           url=url+"?Year="+year+"&Month="+month;
           url=url+"&sid="+Math.random();
		   //alert(url);
           xmlhttp3.onreadystatechange=stateChanged;
           xmlhttp3.open("GET",url,true);
           xmlhttp3.send(null);
}


function stateChanged()
        {
           if(xmlhttp3.readyState==4)
            {
			   document.getElementById("hdData").innerHTML=xmlhttp3.responseText;
            }
        }

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;
        }