How to Toggle a div’s visibility by using a button click

To switch the display-style between block and none you can do something like this:

function toggleDiv(id) {
    var div = document.getElementById(id);
    div.style.display = div.style.display == "none" ? "block" : "none";
}

working demo: http://jsfiddle.net/BQUyT/2/

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