// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= ""
language["start"]	= "->";
language["field"]	= " Veld ";
language["require"]	= " is verplicht";
language["min"]		= " en moet bestaan uit minstens ";
language["max"]		= " en mag niet meer tekens bevatten dan ";
language["minmax"]	= " en niet meer dan ";
language["chars"]	= " karakters";
language["num"]		= " en moet een getal bevatten";
language["email"]	= " is een ongeldig e-mail address";
language["minval"]		= " en mag niet minder zijn dan ";
language["maxval"]		= " en mag niet meer zijn dan ";
// -----------------------------------------------------------------------------
// 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)
// -----------------------------------------------------------------------------

//toegevoegd 02/03/2011 --> moet nog verfijnd worden
function getInputElementByName(name,obj) {
	var el = [];
	var tagNames = ["input","select","textarea","button"];
	for (var i=0;i<tagNames.length;i++) {
		var tags = obj.getElementsByTagName(tagNames[i]);
		for (var j=0;j<tags.length;j++) {
			if (name == tags[j].name) el.push(tags[j]);
		}
	}
	if (el.length == 0) return "";
	else if (el.length == 1) return el[0];
	else return el; //bv radio
};

function define(n, type, HTMLname, min, max, d,highlight) {
	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);
	}
	x = getInputElementByName(n,d);
	/*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,highlight);
		return x;       
	}
	eval("V_"+n+" = new formResult(x, type, HTMLname, min, max);");
	checkObjects[eval(checkObjects.length)] = eval("V_"+n);
	//nieuw stuk voor highlighting
	if (x && highlight){
		if (typeof(highlight)=="string") x.setAttribute("highlight",highlight);
		addEvent(x,"blur",function(){validateRequired(this);});
		validateRequired(x);
		if (typeof(x.watch)!="undefined"){
			x.watch('value',function(property, oldval, newval){
				var t = this;
				setTimeout(function(){validateRequired(t)},200);
				return newval;
			});
			x.watch('selectedIndex',function(property, oldval, newval){
				var t = this;
				setTimeout(function(){validateRequired(t)},200);
				return newval;
			});
		}
	}
}
function undefine(n) {
	for (i = 0; i < checkObjects.length; i++) {
		if(checkObjects[i].form.name == n) {
			var newArr = new Array();
			var tel = 0;
			for (j = 0; j < checkObjects.length; j++) {
				if(i!=j) {
					newArr[tel] = checkObjects[j];
					tel++;
				}
			}
			checkObjects = newArr;
			i=0;
		}
	}
}
function formResult(form, type, HTMLname, min, max) {
	this.form = form;
	this.type = type;
	this.HTMLname = HTMLname;
	this.min  = min;
	this.max  = max;
}
function validate() {
	errors = "";
	if (checkObjects.length > 0) {
		//errorObject = "";
		for (i = 0; i < checkObjects.length; i++) {
			validateSingle(i);
   		}
	}
	if (errors) {
		alert(language["header"].concat("\n" + errors));
		errors = "";
		returnVal = false;
	} else {
		returnVal = true;
	}
}
function validateSingle(i){
	validateObject = new Object();
	validateObject.form = checkObjects[i].form;
	validateObject.HTMLname = checkObjects[i].HTMLname;
	validateObject.type = checkObjects[i].type;
	if (validateObject.type == "num" || validateObject.type == "string" || validateObject.type == "email" || validateObject.type == "numval") {
		validateObject.val = checkObjects[i].form.value;
		validateObject.len = checkObjects[i].form.value.length;
		validateObject.min = checkObjects[i].min;
		validateObject.max = checkObjects[i].max;
		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) == ".") || (validateObject.val.indexOf("@")>validateObject.val.lastIndexOf("."))) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['email'] + "\n"; }
		} else if(validateObject.type == "numval") {
			// Checking if val is between the min and max
			if (isNaN(validateObject.val) || trim(validateObject.val)=="") { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['num'] + "\n"; }
			else {
				if(parseInt(validateObject.val)<validateObject.min || parseInt(validateObject.val)>validateObject.max) errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['num'];
				if(parseInt(validateObject.val)<validateObject.min) { errors += " " + language['minval'] + validateObject.min; }
				if(parseInt(validateObject.val)>validateObject.max) { errors += " " + language['maxval'] + validateObject.max; }
				if(parseInt(validateObject.val)<validateObject.min || parseInt(validateObject.val)>validateObject.max) errors += "\n";
			}
		}
	} else if(validateObject.type == "checked"){
		validateObject.checked = checkObjects[i].form.checked;
 		if (!validateObject.checked){ 
			errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n"; 
		}
 	} else if(validateObject.type == "multichecked"){ //or functie op 
		var o = checkObjects[i].form;
		var rn = stripMultiName(o.name);
		var elem = o.form.elements;
		for (j = 0; j < elem.length; j++) {
			if (stripMultiName(elem[j].name)==rn) {
				if (elem[j].checked) validateObject.checked = true;
			}
		}
 		if (!validateObject.checked){ errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n"; }
 	} else if(validateObject.type == "radio") {
		if (valButton(validateObject.form)==null) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";}
	}
}
function setVerplichtClass(e, c) {
	if (e) {
		if (e.className != "") {
			if (e.className.indexOf(c)==-1) e.className += " " + c;
		} else {
			e.className = c;
		}
	}
};
function removeVerplichtClass(e, c) {
	if (e) {
		var newClass = new String(e.className);
		var result = "";
		newClass = newClass.split(' ');
		for (var i=0;i<newClass.length;i++) {
			if (newClass[i] != c) result += newClass[i] + ' ';
		}
		e.className = result;
	}
};
function validateRequired(obj){
	errors = "";
	var highlight = obj;
	if (obj.getAttribute("highlight")!=null) highlight = document.getElementById(obj.getAttribute("highlight"));
	setVerplichtClass(highlight,"verplicht_highlight");
	if (checkObjects.length > 0) {
		for (i = 0; i < checkObjects.length; i++) {
			if(checkObjects[i].form.name == obj.name)
				validateSingle(i);
   		}
	}
	if (errors == "") {
		removeVerplichtClass(highlight,"verplicht_highlight");
	}
}
function stripMultiName(s){
	//zoek de laatste _ en strip vanaf daar
	var p = s.lastIndexOf('_');
	if (p!=-1) return s.substring(0,p);
	else return s;
}
function valButton(btn) {
	var cnt = -1;
	for (var i=0; i < btn.length; i++) {
		if (btn[i].checked) {cnt = i; i = btn.length;}
	}
	if (cnt > -1) return btn[cnt].value;
	else return null;
}
function trim(value) {
  value = value.replace(/^\s+/,''); 
  value = value.replace(/\s+$/,'');
  return value;
}