function ImgLayerOn_downloads(logo_layer, logo_img, img) {
	document.getElementById(logo_img).src = img;
	document.getElementById(logo_layer).style.display = 'block';
}

function ImgLayerOff_downloads(logo_layer) {
	document.getElementById(logo_layer).style.display = 'none';
}

function ThumbImgOn_downloads(img) {
	document.getElementById('show_img').src = img;
}

function ThumbImgOff_downloads(img) {
	document.getElementById('show_img').src = img;
}