[hhh]

<input type="text" value="100">
<input type="text" value="150">
<input type="text" value="110">

<script>
var max = 100;

for (var i = 0; i < document.querySelectorAll("input").length; i++) {
  var numb = Number(document.querySelectorAll("input")[i].value);

  if (numb > max) {
    max = numb;
   alert(max);
  }
  var selector = 'input[value="'+max+'"]';

}

document.querySelector(selector).id = "someid";
</script>