I need help to ***display in a javascript alert box*** my user input from textboxes, radio buttons, checkboxes and dropdowns and then display it on a submit button press. I currently have no idea how to do it. As you can see, I've tried to set up a function, but its evident I have no clue on what to do with it. All help is appreciated, 

Thanks.

This is it:

```
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-    scale=1.0">
    <title>Questions n Shiz</title>
    <link rel="stylesheet" href="css/normanlize-signup.css">
    <link href='http://fonts.googleapis.com/css?family=Nunito:400,300' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/signup.css">
    <link rel="icon" href="favicon.ico">

<script>
    function displayOutput() {
                var input1 = document.getElementById("name").value;
                var input2 = document.getElementById("mail").value;
                var input3 = document.getElementById("password").value;
                var input4 = document.getElementById("name").value;
                if (input.length === 0) {
                    alert("Please enter a valid input");
                    return;
                }
               document.getElementById("result").innerHTML = "You have entered " + input1;
               alert(?)
            }

    </script>
</head>
<body>

  <form>

    <h1>Enter Thou'st Information</h1>

    <fieldset>

      <legend><span class="number">1</span> Your basic info</legend>

    <label for="name">Name:</label>
    <input type="text" id="name" name="user_name" placeholder="Rob Neale">

    <label for="mail">Email:</label>
    <input type="email" id="mail" name="email" placeholder="robneale@gmail.com">

    <label for="password">Password:</label>
    <input type="password" id="password" name="password" placeholder="robrastamanneale">

    <label>Gender/Sex:</label>
    <input type="radio" id="male" value="male" name="user_gender"><label for="under_16" class="light">Male</label>
      <br>
    <input type="radio" id="female" value="female" name="user_gender"><label for="over_16" class="light">Female</label>

    </fieldset>

    <fieldset>

      <legend><span class="number">2</span> Your profile</legend>

      <label for="bio">Biography:</label>
    <textarea id="bio" name="user_bio" placeholder="Some words go in here ;)"></textarea>

      <label for="house">House:</label>
      <select id="house" name="user_job">
        <optgroup label="House">
          <option value="bradman">Bradman</option>
          <option value="chisholm">Chisholm</option>
          <option value="helpmann">Helpmann</option>
          <option value="mawson">Mawson</option>
          <option value="mccubbin">McCubbin</option>
          <option value="oliphant">Oliphant</option>
          <option value="sutherland">Sutherland</option>
          <option value="thiele">Thiele</option>
        </optgroup>

        </optgroup>

      </select>

      <label>Subjects</label>
      <input type="checkbox" id="development" value="interest_maths" name="user_interest">
      <label class="light" for="development">Maths C</label>
      <br>
      <input type="checkbox" id="design" value="interest_physics" name="user_interest">
      <label class="light" for="design">Physics</label>
      <br>
      <input type="checkbox" id="business" value="interest_chemistry" name="user_interest">
      <label class="light" for="business">Chemistry</label>
      <br>
      <input type="checkbox" id="business" value="interest_biology" name="user_interest">
      <label class="light" for="business">Biology</label>
      <br>
      <input type="checkbox" id="business" value="interest_marine" name="user_interest">
      <label class="light" for="business">Marine Biology</label>
      <br>
      <input type="checkbox" id="business" value="interest_graphics" name="user_interest">
      <label class="light" for="business">Graphics</label>
      <br>
      <input type="checkbox" id="business" value="interest_ipt" name="user_interest">
      <label class="light" for="business">IPT</label>
      <br>
      <input type="checkbox" id="business" value="interest_its" name="user_interest">
      <label class="light" for="business">ITS</label>
      <br>
      <input type="checkbox" id="business" value="interest_business" name="user_interest">
      <label class="light" for="business">Business</label>
      <br>
      <input type="checkbox" id="business" value="interest_legal" name="user_interest">
      <label class="light" for="business">Legal Studies</label>
      <br>
      <input type="checkbox" id="business" value="interest_engineering" name="user_interest">
      <label class="light" for="business">Engineering</label>
      <br>
      <input type="checkbox" id="business" value="interest_accoutngin" name="user_interest">
      <label class="light" for="business">Accounting</label>

    </fieldset>

    <legend><span class="number">3</span> Submit!</legend>
    <input type="checkbox" id="update" value="interest_update" name="user_update">
      <label class="light" for="update">Tick to recieve a free complimentary Elliot</label>

    <button type="submit" onclick="displayOutput()">Submit!</button>

  </form>

</body>

```