function galleryClick(middle, big, id) {
	var img = document.getElementById('img');
	img.src = middle;
	var img_link = document.getElementById('img_link');
	if (big > 0)
		img_link.href = '/gallery/detail.php?q=' + big;
	else
		img_link.removeAttribute("href");

	var img_li = document.getElementById('gallery_'+id);
	var img_ul = img_li.parentNode;
	var img_ar_li = img_ul.getElementsByTagName('li');

    for(var i = 0; i < img_ar_li.length; i++) {
    	img_ar_li[i].className = '';
    }
    img_li.className = 'active';
}