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

Why don't use event? like the following:

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selection result


function itemChange(sender) {
    var c = document.getElementById("content");
    if (sender.value > 0) {
        c.innerHTML = sender.value;
        c.style.visibility = "visible";
    } else {            
        c.innerHTML = "selection result";   
        c.style.visibility = "hidden";
    }
}