number of pins that are not palindromes and unique digits

var c=0;
var size = 4;
for (var i=0; i<10000;i++) {
  var s = i.toString();

  while (s.length < size) s = "0" + s;
  if (!ispal(s) && isuniq(s))
    c++;
}
console.log(c);

function ispal(s) {
  return (s[0] === s[3] && s[1] === s[2]);
}

function isuniq(s) {
  return (s[0] != s[1] && s[0] != s[2] && s[0] != s[3] && s[1] != s[2] && s[1] != s[3] && s[2] != s[3]);
}