WMLScript
WMLScript is the dialect of JavaScript used for WML pages and is part of the Wireless Application Protocol (WAP).
WMLScript is a client-side scripting language and is very similar to JavaScript. Just like JavaScript WMLScript is used for tasks such as user input validation, generation of error message and other Dialog boxes etc.
WMLScript is based on ECMAScript (European Computer Manufacturers Association Script), which is JavaScript's standardized version. Thus the syntax of WMLScript is very similar to JavaScript.
A major difference between JavaScript and WMLScript is that JavaScript code can be embedded in the HTML markup, whereas WMLScript code is always placed in a file separate from the WML markup. URLs are used to refer to the actual WMLScript code in the WML document.