function piilota() {
		if (document.getElementById){
		document.getElementById("himmennin").style.visibility = "hidden";
		document.getElementById("tilaus").style.visibility = "hidden";
		document.getElementById("body").style.overflow = "auto";
		} else if (document.all)
		{
		document.all.himmennin.visibility = "hidden";
		document.all.tilaus.visibility = "hidden";
		document.all.tilaus.overflow = "auto";
		}
	}
	
	function nayta() {
		if (document.getElementById){
		document.getElementById("himmennin").style.visibility = "visible";
		document.getElementById("tilaus").style.visibility = "visible";
		document.getElementById("body").style.overflow = "hidden";
		}
		else if (document.all)
		{
		document.all.himmennin.visibility = "visible";
		document.all.tilaus.visibility = "visible";
		document.all.tilaus.overflow = "hidden";
		}
	}
	
	function validateAndSubmit() 
		{
			if (document.tilausform.nimi.value == '') 
			{            
				alert("Nimikenttä on tyhjä!"); 
				return false;   
			}   
			else if (document.tilausform.email.value == '') 
			{            
				alert("Sähköpostiosoite puuttuu!"); 
				return false;   
			}
			else 
			{       
				return true;   
			}
		}