//-------------------------------------------------------------

// JavaScripts de validation de formulaire HTML

//-------------------------------------------------------------

function isEmpty(s)
{
	return((s == null) || (s.length == 0))
}

//-------------------------------------------------------------

var whitespace = " \t\n\r";

function isWhitespace(s)
{
	var i;

	if(isEmpty(s)) return true;

	for(i = 0; i < s.length; i++)
	{
		var c = s.charAt(i);

		if(whitespace.indexOf(c) == -1) return false;
	}

	return true;
}

//-------------------------------------------------------------

function isEmail(s)
{
	if(isWhitespace(s)) return false;

	var i = 1;
	var sLength = s.length;

	while((i < sLength) && (s.charAt(i) != "@"))
	{ i++ }

	if((i >= sLength) || (s.charAt(i) != "@")) return false;
	else i += 2;

	while((i < sLength) && (s.charAt(i) != "."))
	{ i++ }

	if((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
	else return true;
}