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

.popup { position: relative; display: inline-block; cursor: pointer;} /* The actual popup (appears on top) */.popup .popuptext { visibility: hidden; width: 160px; background-color: #555; color: #fff; text-align: center; border-radius: 6px; padding: 8px 0; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -80px;} /* Popup ...

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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Alert messages can be used to notify the user about something special: danger, success, information or warning.

How To Create a Popup Form Step 1) Add HTML. Use a <form> element to process the input. You can learn more about this in our PHP tutorial.

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

Learn how to create a Modal Box with CSS and JavaScript. How To Create a Modal Box A modal is a dialog box/popup window that is displayed on top of the current page:

The confirm() method displays a dialog box with a message, an OK button, and a Cancel button. The confirm() method returns true if the user clicked "OK", otherwise false.

error.name is an ECMAScript1 (JavaScript 1997) feature. It is supported in all browsers: