function foldtext(id)
{
if(document.getElementById(id).style.display == "block")
{
document.getElementById(id).style.display = "none";
document.getElementById('bild'+id).src = 'images/plus.gif';
document.getElementById('span'+id).innerHTML = " Öffnen";
}
else
{
if(document.getElementById(id).style.display == "none")
{
document.getElementById(id).style.display = "block";
document.getElementById('bild'+id).src = 'images/minus.gif';
document.getElementById('span'+id).innerHTML = " Schließen";
}
}
}

window.onload=checkCookies;

function SwitchDisplay(id) {

	bildObj = document.getElementById('bild'+id);
	blockObj = document.getElementById('block'+id);

  if (blockObj.style.display == 'none') {
      blockObj.style.display = 'inline';
      bildObj.src = 'http://codea.de/images/minus.gif';
      SetCookie('block'+id,'1',30);
  }
  else {
      blockObj.style.display = 'none';
      bildObj.src = 'http://codea.de/images/plus.gif';
      DelCookie('block'+id);
  }
}

function checkCookies() {
  for(n=0;n<3;n++) {
    Cookie = GetCookie('block'+n);
    if (Cookie == null) {
      SwitchDisplay(n);
    }
  }
}

function SetCookie(name,value,days) {
 	if (days) {
		var today = new Date();
		var expire = new Date();
		expire.setTime(today.getTime() + 3600000*24*days);
		var expires = '; expires='+expire.toGMTString();
	} else {
		var expires = '';
	}
	document.cookie = name+'='+value+expires+'; path=/';
}

function GetCookie(name) {
	var nameEQ = name + '=',
		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;
}

function DelCookie(name) {
	SetCookie(name,'',-1);
}