function ValidateEmailAddress(oSrc, args) {
    args.IsValid = IsEmail(args.Value);
}

function IsEmail(Expression) {
    if (Expression == null)
        return (false);

    var supported = 0;
    if (window.RegExp) {
        var tempStr = "a";
        var tempReg = new RegExp(tempStr);
        if (tempReg.test(tempStr)) supported = 1;
    }
    if (!supported)
        return (Expression.indexOf(".") > 2) && (Expression.indexOf("@") > 0);
    var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
    var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");

    return (!r1.test(Expression) && r2.test(Expression));
}