// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();


// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
// n = name of the input field (Required)
// type= string, num, email (Required)
// min = the value must have at least [min] characters (Optional)
// max = the value must have maximum [max] characters (Optional)
// d = (Optional)
// -----------------------------------------------------------------------------

function country(cntr)
{
	if(cntr == 47) //Norwegian language
	{
		language["header"]	= "Følgende feil oppstod:"
		language["start"]	= " ";
		language["field"]	= " Feltet '";
		language["require"]	= "' er påkrevd";
		language["min"]		= " og må bestå av minst ";
		language["max"]		= " og må bestå av flere enn ";
		language["minmax"]	= " men ikke flere enn ";
		language["chars"]	= " tegn";
		language["num"]		= " og må inneholde tall";
		language["email"]	= "' må inneholde en godkjent e-mail adresse";
		language["pnr"]	= "' er ugyldig";
	}
	else if(cntr == 49) //Deuch language
	{
		language["header"]	= "Die folgenden Fehler traten auf:"
		language["start"]	= "->";
		language["field"]	= " Feld ";
		language["require"]	= " wird angefordert";
		language["min"]		= " and must consist of at least ";
		language["max"]		= " and must not contain more than ";
		language["minmax"]	= " and no more than ";
		language["chars"]	= " characters";
		language["num"]		= " and must contain a number";
		language["email"]	= " muß ein gültiges e-post adress enthalten";
	}
	else if(cntr == 40) //English language
	{
		language["header"]	= "The following error(s) occured:"
		language["start"]	= "->";
		language["field"]	= " Field ";
		language["require"]	= " is required";
		language["min"]		= " and must consist of at least ";
		language["max"]		= " and must not contain more than ";
		language["minmax"]	= " and no more than ";
		language["chars"]	= " characters";
		language["num"]		= " and must contain a number";
		language["email"]	= " must contain a valid e-mail address";
	}
}

function define(n, type, HTMLname, min, max, d, req)
{
	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, req);
		return x;       
	}

	eval("V_"+n+" = new formResult(x, type, HTMLname, min, max, req);");
	checkObjects[eval(checkObjects.length)] = eval("V_"+n);
}

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

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;
			validateObject.req = checkObjects[i].req;
			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) == "."))
				{
					//if(validateObject.req == 0 && validateObject.val)
					if(validateObject.req)
					{
						errors += language['start'] + language['field'] + validateObject.HTMLname + language['email'] + "\n";
					}
				}
			}
			else if(validateObject.type == "pnr")
			{
				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
				{
					var sum1;
					var sum2;
					var q1;
					var q2;
					var K1;
					var K2;
					
					sum1=(3*validateObject.val.charAt(0))+(7*validateObject.val.charAt(1))+(6*validateObject.val.charAt(2))+(1*validateObject.val.charAt(3))+(8*validateObject.val.charAt(4))+(9*validateObject.val.charAt(5)+(4*validateObject.val.charAt(6))+(5*validateObject.val.charAt(7))+(2*validateObject.val.charAt(8)))
					q1=Math.floor(sum1/11)
					K1=11-(sum1-(11*q1))
					if (K1 == 11) { K1=0 }
					if (K1 == validateObject.val.charAt(9))
					{
					  	sum2=(5*validateObject.val.charAt(0))+(4*validateObject.val.charAt(1))+(3*validateObject.val.charAt(2))+(2*validateObject.val.charAt(3))+(7*validateObject.val.charAt(4))+(6*validateObject.val.charAt(5)+(5*validateObject.val.charAt(6))+(4*validateObject.val.charAt(7))+(3*validateObject.val.charAt(8))+(2*validateObject.val.charAt(9)))
						q2=Math.floor(sum2/11)
						K2=11-(sum2-(11*q2))
						if (K2 == 11) { K2=0 }
						if (K2 != validateObject.val.charAt(10)){ errors+= language['start'] + language['field'] + validateObject.HTMLname + language['pnr'] + "\n"; }
					}
					else
					{
						errors+= language['start'] + language['field'] + validateObject.HTMLname + language['pnr'] + "\n";
					}
				}
			}
		}
	}
	if (errors)
	{
		alert(language["header"].concat("\n" + errors));
		errors = "";
		returnVal = false;
	}
	else
	{
		returnVal = true;
	}
}