function validate() {

	var email = document.getElementById("w82163").value;
	
	if (email == "") 
	{
		alert('Please enter your email address');
		return false;
	} 
	else if (email.indexOf("@") == -1 || email.indexOf(".") == -1) 
	{
		alert('Please enter a valid email address');
		return false;
	}
	else
	{
		return true;
	}
}