gistfile1.txt

  addLoadEvent(function() {
    var dropdowns = form.getElementsByTagName("select");
    setInterval(function() {
      for(var i = 0; i < dropdowns.length; ++i) {
        if(dropdowns[i].value != "") {
          if(document.getElementsByClassName(dropdowns[i].id).length == 0) {
            var input = document.createElement("input");
            input.type = "hidden";
            input.className = dropdowns[i].id;
            input.name = "lists[]";
            input.value = "108";
            form.appendChild(input);
          }
        } else {
          var input = document.getElementsByClassName(dropdowns[i].id);
          if(input.length != 0) {
            input[0].parentNode.removeChild(input[0]);
          }
        }
      }
    }, 3000);
  });

function addLoadEvent(func) { 
    var oldonload = window.onload; 
    if (typeof window.onload != 'function') { 
      window.onload = func; 
    } else { 
      window.onload = function() { 
        if (oldonload) { 
          oldonload(); 
        } 
        func(); 
      } 
    } 
  }