<!--
function checkAnswers() {
/********************************************************
 *  Adapted from JavaScript Bible, 5th Edition
 *  Chapter 9 Forms and Form Elements
 *  Author Danny Goodman with Michael Morrison
 *  Wiley Publishing Inc., Copyright 2004
 *  ISBN 0-7645-5743-2
 *******************************************************/  
  var form  = window.document.forms[0];
  var count = 0;

  response = new Array("Incorrect.  Biofilms have existed for millennia.",
                       "Incorrect.  Bacteria in biofilms are up to 1,000 times more resistant to antimicrobials than planktonic bacteria.",
                       "Incorrect.  Efficacy is determined using planktonic bacteria.  Biofilm bacteria are inherently more resistant.",
                       "Correct.  True.");
                       


  for ( var i = 0; i < form.elements.length; i++ ) {
    if ( form.elements[i].type == "radio" ) {
      if ( form.elements[i].checked) count++;
    }
  }

  if ( count == 1 ) {
    for ( var i = 0; i < form.elements.length; i++ ) {
      if ( form.elements[i].type == "radio" ) {
        if ( form.elements[i].checked) {
          form.elements[i+1].value = response[i/2];
        } 
        form.elements[i].disabled = true;
      } 
      else if ( form.elements[i].type == "button" ) {
        if ( form.elements[i].name == "B1" ) {
          form.elements[i].disabled = true;
        }
        if ( form.elements[i].name == "B2" ) {
          form.elements[i].disabled = false;
        }
      }
    }
  }
  else {
    alert("Please select an answer");
  }
}

function resetForm() {
/********************************************************
 *  Adapted from JavaScript Bible, 5th Edition
 *  Chapter 9 Forms and Form Elements
 *  Author Danny Goodman with Michael Morrison
 *  Wiley Publishing Inc., Copyright 2004
 *  ISBN 0-7645-5743-2
 *******************************************************/  
  var form = window.document.forms[0];
  for ( var i = 0; i < form.elements.length; i++ ) {
    if ( form.elements[i].type == "radio" ) {
      form.elements[i].checked  = false;
      form.elements[i].disabled = false;
    }
    else if ( form.elements[i].type == "textarea" ) {
      form.elements[i].value = "";
    }
    else if ( form.elements[i].type == "button" ) {
      if ( form.elements[i].name == "B1" ) {
        form.elements[i].disabled = false;
      }
      if ( form.elements[i].name == "B2" ) {
        form.elements[i].disabled = true;
      }
    } 
  }
}
// -->