function linebreak(tname)
{
    var COL_PER_ROW = 6;

    tname=tname.replace(/image/, "");
    tname=tname.replace(/.html/, "");
    var nr = tname*1;
    if ( ( (nr+1) % COL_PER_ROW ) == 0 ) {
        return "</tr><tr>";
    } else {
        return "";
    }
}