function countDigits(){
  var maxDigits = 255; //maximale Zeichenanzahl
  var areaString = document.forms[0].signature.value; 
  var currLength = areaString.length + 1;
  var restLength = maxDigits - areaString.length;
  if (restLength < 0)
  {
  	restLength = 0;
  }
	
  document.getElementById("counter").innerHTML = "Noch " + restLength; 
  if (areaString.length >= maxDigits)
  {
 		//die folgende Zeile entfernt alle Zeichen die größer als maxDigits sind
	  document.forms[0].signature.value = document.forms[0].signature.value.substring(0,maxDigits);
  }
}

function setAvatar(form) {
	var index = form.avatar.selectedIndex;
	form.avatarimage.src= form.avatar.options[index].value;
}


function setImage(form) {
  var index = form.news_image.selectedIndex;
  form.newsimage.src= form.news_image.options[index].value;
}

function setGlass(form) {
  var index = form.cocktail_glass.selectedIndex;
  form.cocktailGlass.src = 'style/cocktail/' + form.cocktail_glass.options[index].value;
}