function isEmpty( s )
{
	var re = new RegExp("[^\\s]|[ ]")
	return !re.test( s )
}

function isEmail( s )
{
	var reg1 = /(@.*@)|(\.\.)|(,)|(@\.)|(\.@)|(^\.)|( )|([æøåÆØÅüöäÜÖÄ])/;	// definitions for nonvalid email
	var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2}|com|net|org|gov|mil|int|biz|pro|info|arpa|aero|coop|name|museum|mobi)(\]?)$/; 	// definitions for valid email
	if (!reg1.test( s ) && reg2.test( s ) ) {
		return true
	} else {
		return false
	}
}

function isPhonenumber( s ) {
	var re = new RegExp("^\\s*\\d{8}\\s*$")
	return re.test( s )
}