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Form analysis
2 forms found in the DOM

<form class="form-inline" onsubmit="chklogin();return(false);"> &nbsp; &nbsp; Username: <input class="input-medium" type="text" id="login_user_username" name="username">
  <br>
  <br> &nbsp; &nbsp; Password: <input class="input-medium" type="password" id="login_user_password" name="password">
  <input type="submit" value="Login" class="btn btn-small btn-primary"> &nbsp; &nbsp; New to <b>js.do</b>? <a href="javascript:;" onclick="signup_show()"><b>Sign-up</b></a>, it's free!
</form>

<form>
  <b>JS.do - Register now to save and manage your JavaScript code:</b>
  <br>
  <br>
  <br>
  <table>
    <tbody>
      <tr>
        <td>Username:</td>
        <td><input type="text" id="signup_user_username"></td>
      </tr>
      <tr>
        <td>Password:</td>
        <td><input type="text" id="signup_user_password"></td>
      </tr>
      <tr>
        <td>Password (confirm):</td>
        <td><input type="text" id="signup_user_password_confirm"></td>
      </tr>
      <tr>
        <td>Email:</td>
        <td><input type="text" id="signup_user_email"></td>
      </tr>
      <tr>
        <td></td>
        <td><input type="button" value="Sign-up" onclick="signup()" class="btn btn-small btn-primary"></td>
      </tr>
    </tbody>
  </table>
</form>

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  Fullscreen   Load code samples
  Run code     Save     Save update     Save as a new js   Add framework jQuery
3.7.1 Bootstrap 3.2.0 (CSS) Bootstrap 3.2.0(JS) Bootstrap 2.3.2 (CSS) Bootstrap
2.3.2 (JS) Processing.js Three.js Font Awesome 4.7 (icons)     Delete Create new
code

JavaScript

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<script>

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​

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document.write("<b>LESSON 1: PRINT HELLO WORLD USING VARIABLES</b><br><br>");

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​

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// To start we will create 2 variables:

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var variable1 = 'Hello ';

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var variable2 = 'World!<br><br>'; // <br> means line break in html

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// Create a third variable by adding both variables:

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var final_text = variable1 + variable2;

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​

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// Print the final result:

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document.write(final_text);

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​

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document.write("<b>LESSON 2: SOLVE AN EQUATION</b><br><br>");

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​

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var n = 9;

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var x = n*n;

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document.write("Result of n*n=" + x);

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​

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document.write("<br><br><b>LESSON 3: PRINT NUMBERS FROM 1 TO 10</b><br><br>");

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​

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// Create a loop of 10 elements.

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// Variable "i" starts with value 1 and while i<=10 it will increment 1 (i=i+1) 

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for (var i=1; i<=10; i=i+1) {

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​

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  document.write(i); // Print the current "i" number

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​

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  // Print a comma followed by a space if i < 10

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  if (i<10) {

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    document.write(", ");

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  }

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}

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​

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function show_random_number() {

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​

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  var random_number = Math.random(); // generate random number between 0 and 1

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  alert(random_number); // show popup with a random number

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}

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​

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</script>

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​

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<p style="color: green">

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The content above was created with JavaScript.<br>

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This content is created with <b>HTML</b>.<br>

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You can edit JavaScript and HTML in the left part of the page

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and click "<b>Run code</b>" to view results in the right part of the page.

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</p>

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<b>LESSON 4: CALL A JAVASCRIPT FUNCTION:</b>

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<input type=button onClick="show_random_number()" value="Generate random number">



||
Result

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Basic samples
 * Hello world
 * Calculator
 * jQuery

        Graphics
 * Canvas Triangle
 * Labyrinth
 * 3D Sombrero equation

JavaScript APIs
 * Twitter API
 * Geolocation API
 * Web Fonts

created by Rodrigo Siqueira

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