function textarea(id, text)
{
    document.getElementById(id).value += text;
}

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

function read_cookie(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 "vreemdeling";
}

function erase_cookie(name) {
	create_cookie(name,"",-1);
    alert("Tot ziens !");
}

function changephoto()
{
  document.getElementById('photo').src = document.getElementById('photolist').options[document.getElementById('photolist').selectedIndex].value;
}

function prevphoto()
{
	if(document.getElementById('photolist').selectedIndex == 0)
	{
		document.getElementById('photolist').selectedIndex = document.getElementById('photolist').options.length-1;
	}
	else
	{
		document.getElementById('photolist').selectedIndex--;
	}
	changephoto();
}

function nextphoto()
{
	if(document.getElementById('photolist').selectedIndex == document.getElementById('photolist').options.length-1)
	{
		document.getElementById('photolist').selectedIndex = 0;
	}
	else
	{
		document.getElementById('photolist').selectedIndex++;
	}
	changephoto();
}