var bImages = new Array();

window.onload = function() {
	//banner_rotate();
	preLoadImages (path + "/images/btn-graph-on.jpg");
	preLoadImages (path + "/images/btn-print-on.jpg");
	preLoadImages (path + "/images/btn-www-on.jpg");
	preLoadImages (path + "/images/btn-ipaper-on.jpg");

	preLoadImages (path + "/images/btn-graph-h.jpg");
	preLoadImages (path + "/images/btn-print-h.jpg");
	preLoadImages (path + "/images/btn-www-h.jpg");
	preLoadImages (path + "/images/btn-ipaper-h.jpg");

	preLoadImages (path + "/images/btn-graph.jpg");
	preLoadImages (path + "/images/btn-print.jpg");
	preLoadImages (path + "/images/btn-www.jpg");
	preLoadImages (path + "/images/btn-ipaper.jpg");


	preLoadImages (path + "/images/btn-uslugi.gif");
	preLoadImages (path + "/images/btn-realizacje.gif");
	preLoadImages (path + "/images/btn-zaufali.gif");
	preLoadImages (path + "/images/btn-onas.gif");
	preLoadImages (path + "/images/btn-kontakt.gif");

	preLoadImages (path + "/images/btn-uslugi-h.gif");
	preLoadImages (path + "/images/btn-realizacje-h.gif");
	preLoadImages (path + "/images/btn-zaufali-h.gif");
	preLoadImages (path + "/images/btn-onas-h.gif");
	preLoadImages (path + "/images/btn-kontakt-h.gif");

}

function preLoadImages (imgSrc) {
    tmpImg     = new Image();
    tmpImg.src = imgSrc;
    bImages[imgSrc] = tmpImg.src;
}

function change_btn_img (img, imgSrc) {
	dImg = document.getElementById(img);

	if (bImages[imgSrc]) {
		dImg.src = bImages[imgSrc];
	} else {
		tmpImg     = new Image();
		tmpImg.src = imgSrc;
		dImg.src = tmpImg.src
	}

}