function CheckEMail( email )
{
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

	if ( !filter.test( email ) ) return false;
	else                         return true;
}

function SubmitSubscribe( email )
{
	if ( email == '' )
	{
		alert( 'Error: Please, type your E-Mail!' );
		return false;
	}
	else if( !CheckEMail( email ) )
	{
		alert( 'Error: Invalid E-Mail Address!' );
		return false;
	}
	else
	{
		return true;
	}
}