function check(element) {
  if (element.value == "" || (element.name == "email" && element.value.indexOf("@") == -1)) {
	element.className = 'fehler';
  }
  else {
	element.className = 'prima';
  }  
}

function textlimit(element, countfield, limit) {
	if (element.value.length > (limit*0.7)) {
		element.style.backgroundColor = '#E7A730';
		document.getElementById('buchst').style.visibility = 'visible';
	}
	
    if (element.value.length > limit) {
        element.value = element.value.substring(0, limit);
		countfield.style.color = '#ff0000';
    } else {
        countfield.value = limit - element.value.length;
    }
}