JavaScript has three kind of popup boxes: Alert box, Confirm box, and Prompt 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> …

Description The alert() method displays an alert box with a message and an OK button. The alert() method is used when you want information to come through to the user.

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How To Create a Modal Box A modal is a dialog box/popup window that is displayed on top of the current page: Open Modal

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The prompt() method displays a dialog box that prompts the user for input. The prompt() method returns the input value if the user clicks "OK", otherwise it returns null.

Callout A callout message is often positioned at the bottom of a page to notify the user about something special: tips/tricks, discounts, action needed, other.

Step 2) Add JavaScript: If an input field (fname) is empty, this function alerts a message, and returns false, to prevent the form from being submitted:

To close the alert message, add a .alert-dismissible class to the alert container. Then add class="close" and data-dismiss="alert" to a link or a button element (when you click on this the …