function evalPwd(s) {
  var cmpx = 0;
  if (s.length >= 6) {
    cmpx++;
    if (s.search("[A-Z]") != -1) {
      cmpx++;
    }
    if (s.search("[0-9]") != -1) {
      cmpx++;
    }
    if (s.length >= 8 || s.search("[\x20-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]") != -1) {
      cmpx++;
    }
    if (s.length >= 12) {
      cmpx++;
    }
  }
  if (cmpx == 0) {
    document.getElementById("weak").className = "nrm";
    document.getElementById("medium").className = "nrm";
    document.getElementById("strong").className = "nrm";
  }
  else if (cmpx == 1) {
    document.getElementById("weak").className = "red";
    document.getElementById("medium").className = "nrm";
    document.getElementById("strong").className = "nrm";
  }
  else if (cmpx == 2) {
    document.getElementById("weak").className = "yellow";
    document.getElementById("medium").className = "yellow";
    document.getElementById("strong").className = "nrm";
  }
  else {
    document.getElementById("weak").className = "green";
    document.getElementById("medium").className = "green";
    document.getElementById("strong").className = "green";
  }
}