function openwin(url, wdth, hght, fen) {
    if (wdth == void(0)) {wdth = 800;}
    if (hght == void(0)) {hght = 600;}
    var fen = fen + "_window"

    var thewin = window.open (url, fen, "resizable=1,scrollbars=1,height="+hght+",width="+wdth);
    if (thewin.blur){
        thewin.focus();
    }
}