var viewform = false;

function validate(thisform){
	var email = thisform.email;
	with (email){
		apos=value.indexOf("@")
		dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2){
			alert('Please enter a valid email');
			email.focus();
			return false;
		}
	}
	alert('Thank You!');
}

function showform(obj)
{
	if (viewform)
	{
		document.getElementById("optin_form").style.display = "none";
		viewform = false;
		obj.innerHTML = "Subscribe to our newsletter";
	} else {
		document.getElementById("optin_form").style.display = "block";
		viewform = true;
		obj.innerHTML = "Subscribe to our newsletter";
	}		
}