Galeria de imagenes

var imageMap = {};

function loadImage(url, id) {
    imageMap[id] = new Image();
    imageMap[id].src = url;
}

function getImage(id) {
    return imageMap[id];
}

function renderImage(id, x, y, width, height) {
    var image = getImage(id);
    context.drawImage(image, x, y, width, height);
}