function picture_viewer(id) {
	obj=return_by_id('viewer');
	obj.style.display='';
	obj.innerHTML='<h3>'+pic_tle[id]['title']+'</h3>';
	obj.innerHTML+='<a href="#" onClick="picture_viewer(\'away\')"><img src="'+pic_ary[id]+'" /></a>';
	obj.innerHTML+='<p>';
	if (id-1>=0)
		obj.innerHTML+='<a href="#" onClick="picture_viewer('+(id-1)+')">back</a> | ';
	obj.innerHTML+='<a href="#" onClick="picture_viewer(\'away\')">close</a>';
	if (id+1<pic_ary.length)
		obj.innerHTML+=' | <a href="#" onClick="picture_viewer('+(id+1)+')">forward</a>';
	obj.innerHTML+='</p>';obj.innerHTML='<p><strong>decsription</strong><br />'+pic_tle[id]['desc']+'</p>';	
	if (id=='away') {
		obj.style.display='none';
	}
}