function open_photo(url)
{
	window.open('/photo.html?url='+escape(url), '_blank', 'width=320, height=240, top=10, left=10, scrollbars=1');
}

function open_sound(url)
{
	window.open('/sound.html?url='+escape(url), '_blank', 'width=320, height=100, top=10, left=10, scrollbars=0');
}

function open_popup(url, target, params)
{
	window.open(url, target, params);
}