function showhide(id)
{
	if (document.getElementById)
	{
		obj = document.getElementById(id);
		if (obj.style.display == "none") { obj.style.display = ""; } 
		else { obj.style.display = "none"; }
	}
}

function chVal()
	{
		var reMail = /^[A-Za-z0-9_.-]+@[A-Za-z0-9_.-]+\.[A-Za-z]{2,3}$/;
		if ((document.subscribe.email.value == '') || !reMail.exec(document.subscribe.email.value)) 
			{
				alert("Моля въведете валиден e-mail адрес!");
				document.subscribe.email.focus();
				return(false);
			}	
								
		return true;
	}