// JavaScript Document
var xmlHttp

var regEmail=/\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/; //regular expression to validate email address

function newsLetter(letterEmail)
{
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	}
	if(letterEmail.length <=0 || letterEmail=='Enter email')
	{
		alert("Please enter email id");
		document.getElementById("letterEmail").value=''
		document.getElementById("letterEmail").focus();
		return false;
	}
	else if(letterEmail.search(regEmail) == -1)
	{
		alert("Please enter valid email id");
		document.getElementById("letterEmail").focus();
		return false;
	}
	var url="ajax/newsLetter.php"
	url=url+"?email="+letterEmail
	xmlHttp.onreadystatechange=stateChanged
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function stateChanged()
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{
		var x=xmlHttp.responseText;
		//document.getElementById("spanNewsLetter").innerHTML='';		
		if(x==1)
		{
			//document.getElementById("spanMonthlyEmail").innerHTML="Thank you";
			document.getElementById("letterEmail").value='';
			alert('Thanks , You have been successfully subscribed with us for newsletter.');
			//document.getElementById("spanNewsLetter").innerHTML='thank you';
		}
		else if(x==2)
		{
			document.getElementById("letterEmail").value='';
			alert('This email-address is already exists in our database.');
			//document.getElementById("spanNewsLetter").innerHTML="Please try again";
		}
			
	} 
}

function GetXmlHttpObject()
{
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}