// ------ Stylesheet ------
function switchimg(itsDiv){
	var imgbig = document.all.groot.src
	document.all.groot.src = itsDiv.src;
	itsDiv.src = imgbig
}

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

// ------ Positie ------

function getposOffset(overlay, offsettype){
var totaloffset=(offsettype=="left")? overlay.offsetLeft : overlay.offsetTop;
var parentEl=overlay.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}

function formulier(curobj, subobjstr, opt_position){
if (document.getElementById){
var subobj=document.getElementById(subobjstr)
subobj.style.display=(subobj.style.display!="block")? "block" : "none"
var xpos=getposOffset(curobj, "left")+((typeof opt_position!="undefined" && opt_position.indexOf("right")!=-1)? -(subobj.offsetWidth-curobj.offsetWidth) :-100)
var ypos=getposOffset(curobj, "top")+((typeof opt_position!="undefined" && opt_position.indexOf("bottom")!=-1)? curobj.offsetHeight : -300)
subobj.style.left=xpos+"px"
subobj.style.top=ypos+"px"
return false
}
else
return true
}

function overlayclose(subobj){
document.getElementById(subobj).style.display="none"
}



function newsletter(theForm) {

// check to see if the field is blank
if (theForm.voornaam.value == "") {
	alert("voornaam is verplicht.");
	theForm.voornaam.focus();
return (false);
}
if (theForm.achternaam.value == "") {
	alert("achternaam is verplicht.");
	theForm.achternaam.focus();
return (false);
}
if (theForm.email.value == "") {
	alert("e-mailadres is verplicht.");
	theForm.email.focus();
return (false);
}

// test if valid email address, must have @ and .
var checkEmail = "@.";
var checkStr = theForm.email.value;
var EmailValid = false;
var EmailAt = false;
var EmailPeriod = false;
for (i = 0;  i < checkStr.length;  i++)
{
ch = checkStr.charAt(i);
for (j = 0;  j < checkEmail.length;  j++)
{
if (ch == checkEmail.charAt(j) && ch == "@")
EmailAt = true;
if (ch == checkEmail.charAt(j) && ch == ".")
EmailPeriod = true;
	  if (EmailAt && EmailPeriod)
		break;
	  if (j == checkEmail.length)
		break;
	}
	// if both the @ and . were in the string
if (EmailAt && EmailPeriod)
{
		EmailValid = true
		break;
	}
}
if (!EmailValid) {
	alert("dit is geen geldig e-mailadres.");
	theForm.emailadres.focus();
return (false);
}

// check if both password fields are the same
if (theForm.emailadres.value != theForm.replay.value)	{
	alert("de emailadressen komen niet overeen.");
	theForm.replay.focus();
return (false);
	}
if (theForm.artikelcode.value == "") {
	alert("artikelcode is verplicht.");
	theForm.artikelcode.focus();
return (false);
}
if (theForm.bericht.value == "") {
	alert("bericht is verplicht.");
	theForm.bericht.focus();
return (false);
}
}
// einde einde einde einde einde einde einde einde einde einde