var xmlHttp

function sendEmail(email)
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	} 

	var url="sendMail.php";
	url=url+"?email="+email;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged() 
{ 
	if (xmlHttp.readyState==4)
	{ 
		if(xmlHttp.responseText=="true")
		{
			document.getElementById('emailTitleArea').innerHTML = '';
			document.getElementById('emailArea').innerHTML = '<span class="eng11rd">Thank you, your email has been added to our mailing list.</span>';
			document.getElementById('errorMsgArea').innerHTML = '';		
			document.getElementById('buttonArea').innerHTML = '';
		}
		else
		{
			document.getElementById('errorMsgArea').innerHTML = '<span class="eng11rd">Server error, please submit your Email Address again!</span></br>';		
		}
	}
}

function checkEmail()
{
	var email = document.getElementById('email').value;
	
	if(validate(email))
	{
		sendEmail(email);
	}
	else
	{
		document.getElementById('errorMsgArea').innerHTML = '<span class="eng11rd">Invalid format email address!</span></br>';		
//		alert('Invalid format email address!');
	}
}

function formSubmit()
{
	document.getElementById('errorMsgArea').innerHTML = '';
	setTimeout("checkEmail()",500);
}
function onKeyPressBlockNumbers(e)
{
	var key = window.event ? e.keyCode : e.which;
	if(key==13)
		return false;
	return true;
}

function validate(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   return reg.test(email);
}

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;
}