var winI = 0;
  function showImg(href,w,h) { 
     w+=20;
     h+=20;
     winI++;
     var left=screen.availWidth/2-w/2;
     var top=screen.availHeight/2-h/2;
     window.open(href,"fs_portI"+winI, "width="+w+", height="+h+", left="+left+", top="+top+", menubar=0, toolbar=0, location=0, directories=0, status=0, resizable=1, scrollbars=1");
  }