function gbookFields(f)
{

if (f.name.value == "")
	{
	alert("Please enter your name.");
	f.name.focus();
	return false;
	}
	
if (f.email.value == "")
	{
	alert("Please enter your email address.");
	f.email.focus();
	return false;
	}
	else
	{
	if (f.email.value.indexOf('@')== -1 || f.email.value.indexOf('.')== -1)
		{
		alert("Please enter a valid email address.");
		f.email.focus();
		return false;
		}
	}
	
if (f.comments.value == "")
	{
	alert("Please enter your comments.");
	f.comments.focus();
	return false;
	}
	return true;
}


function contactFields(f)
{

if (f.name.value == "")
	{
	alert("Please enter your name.");
	f.name.focus();
	return false;
	}
	
if (f.email.value == "")
	{
	alert("Please enter your email address.");
	f.email.focus();
	return false;
	}
	else
	{
	if (f.email.value.indexOf('@')== -1 || f.email.value.indexOf('.')== -1)
		{
		alert("Please enter a valid email address.");
		f.email.focus();
		return false;
		}
	}
	
if (f.comments.value == "")
	{
	alert("Please enter a message.");
	f.comments.focus();
	return false;
	}
	return true;
}