[рони]

Sonya,

<script>
function fn()
{
  var item = document.getElementById("summa");
  function foo() {
    var output = document.getElementById("count");
    output.innerHTML = (this.value / 3).toFixed(2);
  }
  item.addEventListener("input", foo);
  foo.bind(item)();

}

function popup_show(){
if(fn) { fn() ;fn = null};
$('#popup').show();}
</script>