function MaxStringlength(area,maxlen)
{
	var left = maxlen - parseInt(area.value.length);
	if(left < 0)
	{
		left = 0;
		area.value = area.value.substring(0,maxlen);
	}
	var str = left + " Zeichen verbleiben."
	document.getElementById("maxchars").innerHTML = str;
}