title: change highlight color of drop down list in javascript
body: <p>I have a drop down list with 4 items inside . A blue highlight appears when I select one item from it. I want to change that color .. Is it possible?</p>
  
  <p>I have tried following :</p>
  
  <p>I am executing this code on ommouseover of option item(I tried for on click also)</p>
  
  <pre><code>option = document.getElementById("option1");   
  option.style.backgroundColor = "#ff0000";
  </code></pre>
  
  <p>The code is executed but color is not applied . </p>
  
  <p>I have read many similar posts about the same on this site but there is no post to change this blue (default) highlight color. Is there any way to do it?</p>
  
  <p>Thanks</p>