function toggleImage(img) {
  //img = a.children(0);
  if ( img ) {
    imgSrc = img.src;
    if (imgSrc.indexOf("_on") != -1) {
      img.src = imgSrc.replace("_on", "_off");
    } else if (imgSrc.indexOf("_off") != -1) {
      img.src = imgSrc.replace("_off", "_on");
    }
  }
}

function validateIt(form) {
  if(form.connection) obj = form.connection;
  else if(form.answers) obj = form.answers;
  valid = obj.checked;
  i=0;
  while(obj[i]) {
    if(obj[i++].checked) valid = true;
  }
  if( !valid ) {
    alert( "Please select an answer" );
    return false;
  } 
  
  return true;
}