function check_radios(name) {
   var check = false;
   for(i = 0; i < document.getElementsByName(name).length; i++) {
      if(document.getElementsByName(name)[i].checked == true)
         check = true;
   }
   return(check);      
}

function check_checkbox(name) {
   var check = false;
   for(i = 0; i < document.getElementsByName(name).length; i++) {
      if(document.getElementsByName(name)[i].checked == true)
         check = true;
   }
   return(check);      
}

function check_field_length(name, length) {
   var check = false;
   if(document.getElementsByName(name)[0].value.length <= length)
      check = true;
   return(check);      
}

function check_field_min_length(name, min_length) {
   var check = false;
   if(document.getElementsByName(name)[0].value.length >= min_length)
      check = true;
   return(check);      
}

function point_to(name) {
   document.getElementsByName(name)[0].focus();
}