function redirect_to_url() {
	var select_value = document.getElementById('art_name').value;
	top.window.location= select_value;
}

function $(i){return document.getElementById(i)}
function  show_gallery(div_nb) {
	
	var img_tag = document.getElementsByTagName('div');
	for (var i=0; i<img_tag.length; i++) {
		if (String(img_tag[i].className)=="gallery") {
			img_tag[i].style.display='none';
		}
		document.getElementById('gallery'+div_nb).style.display='block';
	}
	return false;
}