function img_view(link, height)
  {
    if(!height) height=580;
    var width=560;
    var left=180;
    var top=100;

    wopener = window.open(link, 'image', 'toolbar=0,location=0,status=1,resizable=1,scrollbars=0,width='+ width +',height='+ height +',top='+ top +',left='+ left);
    wopener.focus();

    return wopener;
  }