function display(id){
  if (document.getElementById(id).style.display == 'none') { document.getElementById(id).style.display = 'block'; }
  else { document.getElementById(id).style.display = 'none'; }
}

function url(url) {
  open(url,'','toolbar = 1, location = 1, directories = 1, status = 1, menubar = 1, scrollbars = 1, resizable = 1');
}

function filter(alpha,img) {
 if (alpha == 100) { alphax = '100'; } else { alphax = '.7'; }
 document.getElementById(img).style.filter='Alpha(opacity=' + alpha + ')';
 document.getElementById(img).style.opacity = alphax;
}