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Function for pop up message in HTML [closed]

stackoverflow.com › questions › 26775654 › function-for-pop-up-message-in-html

If you don't care much about layout of this pop-Up, just use window.confirm()

You can build this into your HTML form like this:

<html>
  <script>
    function checkForm() {
      var message = "You entered following data:\n" + 
        "Car name: " + document.getElementById('cn').value + "\n" +
        "Car color: " + document.getElementById('cc').value + "\n" + 
        "Is this correct?";
      if (window.confirm(message))
        document.getElementById("carform").submit();
    }

  </script>


  <form id="carform" target="...">
    Car name: <input type="text" name="carname" id="cn"/><br/>
    Car color: <input type="text" name="carcolor" id="cc"/><br/>
    <input type="button" value="submit" onclick="checkForm()"/>
  </form>

</html>

EDIT To compare the entered values to the ones you have stored in your SQL database, you have to use PHP. You could realize it for example like this:

<html>
  <script>
    function checkForm() {
      <?php
        //Query the current databse values and store them for example in $carcolor $carname
        echo 'var currentCarName = "' . $carname . '"';
        echo 'var currentCarColor = "' . $carcolor . '"';

      ?>
      var message = "You entered following data:\n" + 
        "Car name: "    + document.getElementById('cn').value + "\n" +
        "  Old name: "  + currentCarName + "\n" +
        "Car color: "   + document.getElementById('cc').value + "\n" + 
        "  Old color: " + currentCarColor + "\n" +
        "Is this correct?";
      if (window.confirm(message))
        document.getElementById("carform").submit();
    }

  </script>


  <form id="carform" target="...">
    Car name: <input type="text" name="carname" id="cn"/><br/>
    Car color: <input type="text" name="carcolor" id="cc"/><br/>
    <input type="button" value="submit" onclick="checkForm()"/>
  </form>

</html>

Answer from lSoleyl on Stack Overflow

W3Schools

w3schools.com › js › js_popup.asp

JavaScript Popup Boxes

To display line breaks inside a popup box, use a back-slash followed by the character n. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report ...

W3Schools

w3schools.com › howto › howto_js_popup.asp

How To Create Popups

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w3schools.com › howto › howto_js_alert.asp

How To Create an Alert Message Box

If you want the ability to close the alert message, add a <span> element with an onclick attribute that says "when you click on me, hide my parent element" - which is the container <div> (class="alert"). Tip: Use the HTML entity "×" to create the letter "x".

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HTML Popup Message Guide: HTML, CSS, and JavaScript (+Hack)

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Stack Overflow

stackoverflow.com › questions › 26775654 › function-for-pop-up-message-in-html

Function for pop up message in HTML - javascript

Top answer

1 of 2

If you don't care much about layout of this pop-Up, just use window.confirm()

You can build this into your HTML form like this:

<html>
  <script>
    function checkForm() {
      var message = "You entered following data:\n" + 
        "Car name: " + document.getElementById('cn').value + "\n" +
        "Car color: " + document.getElementById('cc').value + "\n" + 
        "Is this correct?";
      if (window.confirm(message))
        document.getElementById("carform").submit();
    }

  </script>


  <form id="carform" target="...">
    Car name: <input type="text" name="carname" id="cn"/><br/>
    Car color: <input type="text" name="carcolor" id="cc"/><br/>
    <input type="button" value="submit" onclick="checkForm()"/>
  </form>

</html>

EDIT To compare the entered values to the ones you have stored in your SQL database, you have to use PHP. You could realize it for example like this:

<html>
  <script>
    function checkForm() {
      <?php
        //Query the current databse values and store them for example in $carcolor $carname
        echo 'var currentCarName = "' . $carname . '"';
        echo 'var currentCarColor = "' . $carcolor . '"';

      ?>
      var message = "You entered following data:\n" + 
        "Car name: "    + document.getElementById('cn').value + "\n" +
        "  Old name: "  + currentCarName + "\n" +
        "Car color: "   + document.getElementById('cc').value + "\n" + 
        "  Old color: " + currentCarColor + "\n" +
        "Is this correct?";
      if (window.confirm(message))
        document.getElementById("carform").submit();
    }

  </script>


  <form id="carform" target="...">
    Car name: <input type="text" name="carname" id="cn"/><br/>
    Car color: <input type="text" name="carcolor" id="cc"/><br/>
    <input type="button" value="submit" onclick="checkForm()"/>
  </form>

</html>

2 of 2

There's no native function for making a pop up message show up loading HTML. However there is FancyBox which does exactly this.

http://fancybox.net/

Look at this question and this blog for more information on how to do this

GeeksforGeeks

geeksforgeeks.org › html › how-to-create-popup-box-using-html-and-css

How to Create Popup Box using HTML and CSS? - GeeksforGeeks

27:22

This method toggles the popup's visibility by changing its CSS display property. ... <html> <head> <style> .popup { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5); justify-content: center; align-items: center; } .popup-content { background: #fff; padding: 20px; border-radius: 5px; text-align: center; } .popup:target { display: flex; } </style> </head> <body> <a href="#popup" style="padding: 10px 20px; background-color: #007BFF; color: #fff; text-decoration: none; border-radius: 5px;">Open Popup</a> <div id="popup" class="popup"> <div class="popup-content"> <h2>Popup Title</h2> <p>This is a simple popup box.</p> <a href="#" style="display: inline-block; margin-top: 10px; padding: 5px 10px; background-color: #dc3545; color: #fff; text-decoration: none; border-radius: 3px;">Close</a> </div> </div> </body> </html>

Published July 23, 2025

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