var querywindow = '';

function open_querywindow(url,width,height) {

    if (!querywindow.closed && querywindow.location) {
        querywindow.focus();
    } else {
        querywindow=window.open(url, '','toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=yes,resizable=yes,width='+width+',height='+height);
    }

    if (!querywindow.opener) {
        querywindow.opener = self;
    }

    if (window.focus) {
        querywindow.focus();
    }

    return false;
}