function changeContent(content) 
{
	document.getElementById('textarea').innerHTML = content;
}

function preloadImgs(number) 
{
	var imgs = new Array();
	for (i=0; i<number; i++)
	{
		imgs[i] = new Image();
		imgs[i].src='./img/photo'  + (i+1) + '.jpg';
	}

	for (i=0;i<imgs.length;i++)
	{
//		alert(imgs[i].src);
	}
	return imgs;
}

var stap=0
var beeldnr=0

function switchImgs(imgs) {
  if (!document.images)
    return
  if (document.all)
    slide.filters.blendTrans.apply()
  document.images.slide.src=eval("imgs["+stap+"].src")
  if (document.all)
    slide.filters.blendTrans.play()
  beeldnr=stap
  if (stap<(imgs.length-1))// wijzigen indien meer beeldjes
    stap++
  else
    stap=0
  setTimeout("switchImgs(imgs)",10000)// tijd tussen twee beeldjes
}

function checkForm(form) {
	var errorOccured=false;
	var errorLocation=0;
	if (form.name.value == "") {
		document.getElementById('errorName').innerHTML = "Vul uw naam in.<br><br>";
		errorOccured=true;
		errorLocation=1;
	}
	else 
		document.getElementById('errorName').innerHTML = "";

	if (form.address.value == "") {
		document.getElementById('errorAddress').innerHTML = "Vul uw adres in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=2;
		}
	}
	else 
		document.getElementById('errorAddress').innerHTML = "";

	if (form.postalcode.value == "") {
		document.getElementById('errorPostalcode').innerHTML = "Vul uw postcode in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=3;
		}
	}
	else 
		document.getElementById('errorPostalcode').innerHTML = "";

	if (form.place.value == "") {
		document.getElementById('errorPlace').innerHTML = "Vul uw woonplaats in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=4;
		}
	}
	else 
		document.getElementById('errorPlace').innerHTML = "";

	if (form.date.value == "") {
		document.getElementById('errorDate').innerHTML = "Vul uw geboortedatum in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=5;
		}
	}
	else 
		document.getElementById('errorDate').innerHTML = "";

	if (form.phone.value == "") {
		document.getElementById('errorPhone').innerHTML = "Vul uw telefoonnummer in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=6;
		}
	}
	else 
		document.getElementById('errorPhone').innerHTML = "";

	if (form.email.value == "") {
		document.getElementById('errorEmail').innerHTML = "Vul uw email adres in.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=7;
		}
	}
	else 
		document.getElementById('errorEmail').innerHTML = "";

	if (form.interest1.checked==false &&  form.interest2.checked==false && form.interest3.checked==false) {
		document.getElementById('errorInterest').innerHTML = "Geef uw interesse aan door het aanvinken van één of meerdere selectievakjes.<br><br>";
		errorOccured=true;
		if (errorLocation==0)
		{
			errorLocation=8;
		}
	}
	else 
		document.getElementById('errorInterest').innerHTML = "";

	if (errorOccured)
	{
		if (errorLocation==1)
		{
		  form.name.focus();
		}
		if (errorLocation==2)
		{
		  form.address.focus();
		}
		if (errorLocation==3)
		{
		  form.postalcode.focus();
		}
		if (errorLocation==4)
		{
		  form.place.focus();
		}
		if (errorLocation==5)
		{
		  form.date.focus();
		}
		if (errorLocation==6)
		{
		  form.phone.focus();
		}
		if (errorLocation==7)
		{
		  form.email.focus();
		}
		if (errorLocation==8)
		{
		  form.interest1.focus();
		}
		return false ;
	}

	return true ;

}