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

// 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;
}