function preload()
{
image_1 = new Image();
image_1.src = "images/trame04.jpg";
image_2 = new Image();
image_2.src = "images/fruit.jpg";
image_3 = new Image();
image_3.src = "images/logo-hubert-cloix.gif";
image_4 = new Image();
image_4.src = "images/trame06.gif";
}