Is it possible to use JS to open an HTML select to show its option list? [duplicate]

Is it possible to use JavaScript to open an HTML select to show its option list?

Solution 1:

Unfortunately there's a simple answer to this question, and it's "No"

Solution 2:

I had this problem...and found a workable solution.

I didn't want the select box to show until the user clicked on some plain HTML. So I overlayed the select element with opacity=.01. Upon clicking, I changed it back to opacity=100. This allowed me to hide the select, and when the user clicked the text the select appeared with the options showing.

Solution 3:

This works on Google Chrome

dropDown = function (elementId) {
    var dropdown = document.getElementById(elementId);
    try {
        showDropdown(dropdown);
    } catch(e) {

    }
    return false;
};

showDropdown = function (element) {
    var event;
    event = document.createEvent('MouseEvents');
    event.initMouseEvent('mousedown', true, true, window);
    element.dispatchEvent(event);
};

Solution 4:

I use this... but it requires the user to click on the select box...

Here are the 2 javascript functions

function expand(obj)
{
    obj.size = 5;
}
function unexpand(obj)
{
    obj.size = 1;
}

then i create the select box

<select id="test" multiple="multiple" name="foo" onFocus="expand(this)" onBlur="unexpand(this)">
<option >option1</option>
<option >option2</option>
<option >option3</option>
<option >option4</option>
<option >option5</option>
</select> 

I know this code is a little late, but i hope it helps someone who had the same problem as me.

ps/fyi i have not tested the code above (i create my select box dynamically), and the code i did write was only tested in FireFox.