function check_max_length(Object, MaxLen)
{
  if(Object.value.length > MaxLen)
  {      
    Object.value = Object.value.substring(0, MaxLen);
  }
}

function update_counter(container, counter, value, maxValue, className, alertClass)
{
	document.getElementById(counter).innerHTML = value;
	
	if(value >= maxValue) {
		document.getElementById(container).className = alertClass;
	} else {
		document.getElementById(container).className = className;
	}
}