function radioSelected(radio){
  result = false;
  for (var i=0; i<radio.length; i++){
    if(radio[i].checked){result = true;}
  }
  return result;
}
function checkCustreviewForm(){
  if (!document.custreview.name.value){
    alert('Please enter your name'); return false;
  }
  if (!document.custreview.message.value){
    alert('Please enter your message'); return false;
  }
  if (!radioSelected(document.custreview.rate)){
    alert('Please select a rate'); return false;
  }
  return true;
  
  }