/*
Vérification de l'adresse mail
*/
function emailCheck (emailStr) {
    var emailPat = /^(.+)@(.+)$/
    var specialChars = "\\(\\)<>@,;:\\\\\\\"\\.\\[\\]éèàîïäâëêçùü"
    var validChars = "\[^\\s" + specialChars + "\]"
    var quotedUser = "(\"[^\"]*\")"
    var ipDomainPat = /^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
    var atom = validChars + '+'
    var word = "(" + atom + "|" + quotedUser + ")"
    var userPat = new RegExp("^" + word + "(\\." + word + ")*$");
    var domainPat = new RegExp("^" + atom + "(\\." + atom +")*$");
    var matchArray = emailStr.match(emailPat);
    
    if (matchArray == null) {
        return("L'adresse email semble incorrecte (verifier @ et .'s)");
    };
    var user = matchArray[1];
    var domain = matchArray[2];

    if (user.match(userPat) == null) {
        return("Le nom dans l'adresse email est invalide.");
    };

    var IPArray = domain.match(ipDomainPat)
    if (IPArray != null) {
        for (var i=1; i<=4; i++) {
            if (IPArray[i] > 255) {
                return("L'IP de l'adresse email est invalide !");
            };
        };
        return("");
    };

    var domainArray = domain.match(domainPat);
    if (domainArray == null) {
        return("Le nom de domaine de l'email est invalide.");
    };

    var atomPat = new RegExp(atom,"g");
    var domArr = domain.match(atomPat);
    var len = domArr.length;
    if (domArr[domArr.length-1].length < 2 ||
        domArr[domArr.length-1].length > 4) {
        return("L'adresse email doit finir par trois lettres, ou deux lettres pour les pays.");
    };

    if (len < 2) {
        return("Il manque le nom d'hôte à l'adresse email !");
    };

    return("");
}




/*
	verifie que le num de tel ou fax contient bien 10 chiffres. 
*/
function telCheck ( telStr ) {

	var str = telNum( telStr );
	//alert( str);
	if ( str.length != 10 ) {
		return "Les numéros de tel doivent contenir 10 chiffres !";
	};
	return "";
}

/*
	vérifie un format de date
*/
function isDate(dateStr) {
    var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/;
    var matchArray = dateStr.match(datePat); // is the format ok?
    if (matchArray == null) {
        //alert("Please enter date as either mm/dd/yyyy or mm-dd-yyyy.");
	    return false;
	}		
    month = matchArray[3]; // parse date into variables
    day = matchArray[1];
    year = matchArray[5];
    if (month < 1 || month > 12) { 
		// check month range
        //alert("Month must be between 1 and 12.");
        return false;
    }
    if (day < 1 || day > 31) {
        //alert("Day must be between 1 and 31.");
        return false;
    }
    if ((month==4 || month==6 || month==9 || month==11) && day==31) {
        //alert("Month "+month+" doesn't have 31 days!")
        return false;
    }
    if (month == 2) { // check for february 29th
        var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		if (day > 29 || (day==29 && !isleap)) {
		    //alert("February " + year + " doesn't have " + day + " days!");
		    return false;
		}
	}
    return true; // date is valid
}