Hiding Dropdown Values using javascript on community

Create Custom link Javacript:

{!REQUIRESCRIPT("/communityName/resource/1424668417000/krrish")}

Uploaded static resource:

Name: krrish.js

Code:

setTimeout(function(){

var optionDrop = document.getElementById("00N40000002IC8J");

for (i = 0; i < optionDrop.options.length; i++) {

  if(optionDrop[i].value=='Actional' || optionDrop[i].value=='DataXtend SI'|| optionDrop[i].value=='Savvion'||optionDrop[i].value=='Sonic'||optionDrop[i].value=='DCM'||optionDrop[i].value=='POS'||optionDrop[i].value=='ObjectStore'||optionDrop[i].value=='Other'||optionDrop[i].value=='GCE'||optionDrop[i].value=='CIS'||optionDrop[i].value=='EDI'||optionDrop[i].value=='Hosting Services')

    {

   optionDrop[i].style.display= "none";

   }

}},1000);