How to show/hide DIV on selection of ANY drop-down value?

Question

I have found many answers to the question:

How do I show/hide DIV on selection of \"Other\" dropdown value.

However I cannot fin

Answer 1

add the following function to the onchange,

function showHide(value) {
    if (value=='')
        document.getElementById('divShow').style.display = 'none';
    else
        document.getElementById('divShow').style.display = 'block';
}

and set the display style of the div (which is needed to hide/shown) to none initially. Check demo here