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

	function validateEmail()
	{
		var email ="";
		var SMS ="";
		var obj = document.forms['observer'];
		email = obj.elements['Email'].value;		
		SMS = obj.elements['SMS'].value;
			
		if(!isEmail(email)&& SMS.length == 0)
		{
			alert("Not a valid E-Mail address.");
			return false;
		}
		
		
		return true;
	}

	function subsc()
	{		
		if (!validateEmail()) 
		{
  			return false;
		}
		document.forms['observer'].action = "http://se.yhp.waymaker.net/unibet/new/pren/prenorder.asp";
		document.forms['observer'].elements['SubscribeAction'].value=1;
		document.forms['observer'].submit();
		
	}

	function unsubsc()
	{
		if (!validateEmail()) 
		{
     		return false;
		}
		document.forms['observer'].action = "http://se.yhp.waymaker.net/unibet/new/pren/prenorder.asp";
		document.forms['observer'].elements['SubscribeAction'].value=0;
		document.forms['observer'].submit();
		return true;
	}