function textCounter(fieldname, countfield, maxlimit) 
{
	if (fieldname.value.length > maxlimit)
		fieldname.value = fieldname.value.substring(0, maxlimit);
	else 
		countfield.value = maxlimit - fieldname.value.length;
}

var rules=new Array();
  rules[0]='nombre|required|' + _CNT_NAME_REQUIRED;
  rules[1]='email|required|' + _CNT_EMAIL_REQUIRED;
  rules[2]='email|email|' + _CNT_EMAIL_EMAIL;
  rules[2]='telephono|required|' + _CNT_TELEPHONO_REQUIRED;
  rules[3]='description|required|' + _CNT_COMMENTS_REQUIRED;