if (document.images) {
    img1 = new Image();
    img1.src = "./img/colors/white_80.png";
	img2 = new Image();
    img2.src = "./img/colors/yellow_80.png";
	img3 = new Image();
    img3.src = "./img/sprites/portfolio.png";
	img4 = new Image();
    img4.src = "./img/awards/award_bck.png";
}