function toggledisplay (id){
  if (document.getElementById) {
    var mydiv = document.getElementById(id);
    mydiv.style.display = (mydiv.style.display=='block'?'none':'block');
  }
}

function hideshow(id) {
		var elem = document.getElementById("hidden" + id);
		var img  = document.getElementById("hiddenimg" + id);
		if(elem.style.display == "none") {
			elem.style.display = "block";
			img.src = 'http://www.t-world.ch/htmlinclude/images/collapse.gif';
		} else {
			elem.style.display = "none";
			img.src = 'http://www.t-world.ch/htmlinclude/images/expand.gif';
		}
		return true;
	}