February 2015
Intermediate to advanced
664 pages
24h 26m
Polish
Content preview from Programowanie w JavaScript Rusz głową!
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416
Rozdział 9.
Dodawanie procedury obsługi zdarzeń
Krok 2. Dodanie procedury obsługi zdarzeń i aktualizacja obrazka
Aby dodać procedurę, która będzie obsługiwać kliknięcia obrazka, musimy jedynie
przypisać wybraną funkcję właściwości
onclick
elementu obrazka. Załóżmy, że nasza
funkcja będzie nosić nazwę
showAnswer
— jej definicję znajdziesz u dołu strony.
Także tutaj najpierw musimy
pobrać obiekt obrazka z DOM.
function showAnswer() {
var image = document.getElementById(”zero”);
image.src = ”zero.jpg”;
}
Kiedy już pobierzemy obrazek,
możemy go podmienić, zmieniając
wartość właściwości src i zapisując
w niej nazwę pliku zawierającego
normalną wersję ...
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