WMLBUTTONUP

WMLBUTTONUP is a term related to Wireless Markup Language (WML), a subset of XML designed for devices with limited screen size and input capabilities, such as early mobile phones. Specifically, WMLBUTTONUP refers to an event that occurs when a user releases a button on their device while interacting with a WML-based web page.

In WML, user interactions are often mapped to specific events. When a user presses and then releases a hardware button (like a navigation key or an "OK" button) on a WML-enabled device, this action can trigger a WMLBUTTONUP event. This event can then be handled by the WML code of the page, allowing developers to execute specific actions.

For instance, a WML page might be designed to respond to a WMLBUTTONUP event by navigating to a different card, submitting a form, or performing some other user-defined action. This event handling is crucial for creating interactive WML applications that respond to user input. Understanding WMLBUTTONUP is important for anyone working with or developing for older mobile web platforms that relied on WML.