var galleryLast;
var arr=document.getElementsByTagName("a");
for (i=0; ; i++) { 
	if (arr[i].className=="img-active") {
		galleryL=arr[i];
		break;
	}	
}
function changephoto(elem) {
	var large;
	if(large=document.getElementById("large")) {
		large.src=elem.href;
		elem.className="img-active";
		if (galleryLast && (galleryLast!=elem)) galleryLast.className="";
		galleryLast=elem;
	}

}