// email

function checkEmail (strng) {
	var error="";
	if (strng == "") {
		 error = "Vous n'avez pas fourni d'adresse email.\n";
	} else {
		var emailFilter=/^.+@.+\..{2,3}$/;
		if (!(emailFilter.test(strng))) { 
			error = "Entrez une adresse email valid.\n";
		} else {
			//test email for illegal characters
			var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
			if (strng.match(illegalChars)) {
				error = "L'adresse email contient des caracteres invalides.\n";
			 }
		}
	}
	return error;    
}


// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
	var error = "";
	if (strng == "") {
		 error = "Vous n'avez pas entré de numéro de tél.\n";
	} else {
		var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "Le numéro de tél contient des caractères non appropriés.";
    }
    if (!(stripped.length >= 9)) {
        error = "Le numéro de tel n'a pas la bonne longueur, vérifiez que vous n'avez pas oublié de numéros.\n";
    } 
	}
	return error;
}


// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a password.\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    
    if ((strng.length < 6) || (strng.length > 8)) {
       error = "The password is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
      error = "The password contains illegal characters.\n";
    } 
    else if (!((strng.search(/(a-z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
       error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
    }  
return error;    
}    


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a username.\n";
}


    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length < 4) || (strng.length > 10)) {
       error = "The username is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n";
    } 
return error;
}       


// non-empty textbox

function isEmpty(strng, pMsg) {
	var error = "";
  if (strng.length == 0) {
     error = "Veuillez renseigner le champ "+pMsg+" .\n"
  }
	return error;     
}

// was textbox altered

function isDifferent(strng) {
var error = ""; 
  if (strng != "Can\'t touch this!") {
     error = "You altered the inviolate text area.\n";
  }
return error;
}

// exactly one radio button is chosen

function checkRadio(checkvalue, pMsg) {
var error = "";
   if (!(checkvalue)) {
       error = pMsg+".\n";
    }
return error;
}

// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the drop-down list.\n";
    }    
return error;
}