function check_ss() {
    var smiles = document.JME.smiles();
    var jme = document.JME.jmeFile(); 
    var mol = document.JME.molFile();
    if (smiles.length < 1) {
      alert("No molecule!");
    }
    else {
      document.form.smiles.value = smiles;
      document.form.jme.value = jme;
      document.form.mol.value = mol;
      var info = document.referrer;
      info += " - " + navigator.appName + " - " + navigator.appVersion;
      info += " " + screen.width + "x" + screen.height;
      document.form.rinfo.value = info;
      document.form.submit();
    }
  }