Option #2: from Javascript using the DOM: element.onclick = mouseClick; or element.addEventListener("click", mouseClick); Example of the powerful listener/emitter pattern

onclick Event Type This is the most frequently used event type which occurs when a user clicks the left button of his mouse. You can put your validation, warning etc., against this event type.

To use JavaScript to calculate the price, we insert the price computation code inside the quotes for the onclick attribute But lose the alert; we’ll replace it later

More modular Scales better to long functions, several event handlers Cons: Because all class methods are public, it exposes the onClick function (which should be private)

#include apdefap.h void OnClick(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName) if (pictname != NULL)

ter.html in a browser. Clic. o. the button labelled ‘Show answer’ – what happens? 3. Open the same file in a text editor such as N. te. ad or in a web page editing program such as Dre. mweaver. 4. Add …

Specify number of rows and columns of views. Allows specification of exact x,y coordinates of layout’s children.