Javascript event doesn't fire when select box options have focus

Question

I'm trying to get something to happen (write to div ) when a select box option has the focus. From the jsfiddle code, you can see I've got it working after the fact -- that is, once the option is selected and the mouse is moved back to the now-closed select box. How do I get it to work when the box is open?

(In case it matters, I have another function bound to the same element (the select box) that fires on a 'change' event. I wonder if that's the problem?).

HTML :

<div id="Hint"></div>
<div id='select-container'>
    <select name="parent_selection" id="parent_selection">
        <option selected="selected">-- Select 1st option --</option>
        <option value="option1">Option 1</option>
        <option value="option2">Option 2</option>
        <option value="option3">Option 3</option>
    </select>
    <select name="child_selection" id="child_selection">
        <option value="">-- Select 2nd option --</option>
    </select>
</div>

JavaScript :

//Display hint for hovered selection in 1st dropdown
var elSelect_container, elHint; // Declare variables

elAppSelected = document.getElementById('parent_selection');
elHint = document.getElementById('Hint');

function Hint() {
    var elAppSelected = this.options[this.selectedIndex].value;

    if (elAppSelected === 'option1') {
        elHint.innerHTML = 'Good choice';
    }
    if (elAppSelected === 'option2') {
        elHint.innerHTML = 'Better choice';
    }
    if (elAppSelected === 'option3') {
        elHint.innerHTML = 'Best Choice!';
    }
}
    //Create event listener: mouseover calls Hint()
    elAppSelected.addEventListener('mouseover', Hint, false);

http://jsfiddle.net/rpt613/a8hxa1jm/30/

Answer 1

I think your issue is in the onchange event that is not shown. I changed addEventListener to change vs mouseover and the example works fine. I am not sure what u need the other onchange event for but maybe you can combine them.

JavaScript:

//Display hint for hovered selection in 1st dropdown
var elSelect_container, elHint; // Declare variables

elAppSelected = document.getElementById('parent_selection');
elHint = document.getElementById('Hint');

function Hint() {
    var elAppSelected = this.options[this.selectedIndex].value;

    if (elAppSelected === 'option1') {
        elHint.innerHTML = 'Good choice';
    }
    if (elAppSelected === 'option2') {
        elHint.innerHTML = 'Better choice';
    }
    if (elAppSelected === 'option3') {
        elHint.innerHTML = 'Best Choice!';
    }
}
    //Create event listener: mouseover calls Hint()
    elAppSelected.addEventListener('change', Hint, false);         
  //elAppSelected.addEventListener('mouseover', Hint, false);

http://jsfiddle.net/a8hxa1jm/31/