function setImage(img, file) {
   img.src = "images/" + file;
}

function open_browse_window(url) {
  subWindow = window.open(url, 'subwindow', 'width=600,height=600,resizable,scrollbars,status,location,toolbar');
  subWindow.focus();
}

function open_external_window(url) {
  newWin = window.open(url, 'external', 'resizable,scrollbars,directories,status,location,toolbar,menubar');
  newWin.focus();
}