// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var checkObjects    = new Array();
var errors      = "";
var returnVal       = false;
var language        = new Array();
language["header"]  = "Les erreurs suivantes sont arrivées :"
language["start"]   = "->";
language["field"]   = " Le champ ";
language["require"] = " est requis";
language["min"]     = " et doit consister d'au moins ";
language["max"]     = " et ne doit pas contenir plus de ";
language["minmax"]  = " et pas plus de ";
language["chars"]   = " caractères";
language["num"]     = " et doit contenir un nombre";
language["email"]   = " doit contenir une adresse e-mail valide";


// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
// n = nom de variable du champs (Requis) Ex : text1
// type = string, num, email (Requis) Ex : string
// HTMLname = nom du champs (Requis) Ex : Prénom 
// min = la valeur doit avoir au moins [min] caractères (Optionel)
// max = la valeur doit avoir au maximum [max] caractères (Optionel)
// d = (Optionel)
// -----------------------------------------------------------------------------

//fonction define
function define(n, type, HTMLname, min, max, d)
{
var p;
var i;
var x;

if (!d) d = document;

if ((p=n.indexOf("?"))>0&&parent.frames.length)
    {
    d = parent.frames[n.substring(p+1)].document;
    n = n.substring(0,p);
    }

if (!(x = d[n]) && d.all) x = d.all[n];

for (i = 0; !x && i < d.forms.length; i++)
    {
    x = d.forms[i][n];
    }
    
for (i = 0; !x && d.layers && i < d.layers.length; i++)
    {
    x = define(n, type, HTMLname, min, max, d.layers[i].document);
    return x;       
    }
    
eval("V_"+n+" = new formResult(x, type, HTMLname, min, max);");

checkObjects[eval(checkObjects.length)] = eval("V_"+n);
}

//fonction formResult
function formResult(form, type, HTMLname, min, max)
{
this.form = form;
this.type = type;
this.HTMLname = HTMLname;
this.min  = min;
this.max  = max;
}

//fonction validate
function validate()
{
if (checkObjects.length > 0)
    {
    errorObject = "";
    for (i = 0; i < checkObjects.length; i++)
        {
        validateObject = new Object();
        validateObject.form = checkObjects[i].form;
        validateObject.HTMLname = checkObjects[i].HTMLname;
        validateObject.val = checkObjects[i].form.value;
        validateObject.len = checkObjects[i].form.value.length;
        validateObject.min = checkObjects[i].min;
        validateObject.max = checkObjects[i].max;
        validateObject.type = checkObjects[i].type;
        if (validateObject.type == "num" || validateObject.type == "string")
            {
            if ((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val)))
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['num'] + "\n";
                }
            else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max))
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['minmax'] + validateObject.max+language['chars'] + "\n";
                }
            else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min))
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['chars'] + "\n";
                }
            else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max))
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['max'] + validateObject.max + language['chars'] + "\n";
                }
            else if (!validateObject.min && !validateObject.max && validateObject.len <= 0)
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";
                }
            }
        else if(validateObject.type == "email")
            {
            // Checking existense of "@" and ".". 
            // Length of must >= 5 and the "." must 
            // not directly precede or follow the "@"
            if ((validateObject.val.indexOf("@") == -1) || (validateObject.val.charAt(0) == ".") || (validateObject.val.charAt(0) == "@") || (validateObject.len < 6) || (validateObject.val.indexOf(".") == -1) || (validateObject.val.charAt(validateObject.val.indexOf("@")+1) == ".") || (validateObject.val.charAt(validateObject.val.indexOf("@")-1) == "."))
                {
                errors += language['start'] + language['field'] + validateObject.HTMLname + language['email'] + "\n";
                }
                }
        }
    }
if (errors)
    {
    alert(language["header"].concat("\n" + errors));
    errors = "";
    returnVal = false;
    }
else
    {
    returnVal = true;
    }
}