function show_printer_friendly(ids)
{
    var word_list = "";
    var delim = "";
    for (var i in ids)
    {
        id = ids[i];
        chk = document.getElementById(id);
        if (chk == null)
            continue;

	if (chk.checked == true)
	{
	    word_list += delim + id;
	    delim = "-";
	}
    }

    url = '/vocabulary/basket/printer_friendly/' + word_list;
    title = 'printer_friendly';
    arguments = 'width=800,height=500,resizable=yes,menubar=yes,directories=no,status=no,scrollbars=yes';
    //window.open(url,_new)
    window.open(url,title,arguments)
}