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html - Javascript - Dynamically assign onclick event in the loop

I have very simple html page with js code:

<html>
    <head>
        <title></title>
    </head>
    <body>

        <div id="divButtons">

        </div>

        <script type="text/javascript">
            var arrOptions = new Array();

            for (var i = 0; i < 10; i++) {
                arrOptions[i] = "option" + i;
            }

            for (var i = 0; i < arrOptions.length; i++) {
                var btnShow = document.createElement("input");
                btnShow.setAttribute("type", "button");
                btnShow.value = "Show Me Option";
                var optionPar = arrOptions[i];
                btnShow.onclick = function() {
                    showParam(optionPar);
                }

                document.getElementById('divButtons').appendChild(btnShow);
            }

            function showParam(value) {
                alert(value);
            }        
        </script>
    </body>
</html>

That page binds 10 buttons, but when you click on any button it always shows alert "option9". How is it possible assign onclick event to show correspondent option !?

Thanks!

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You'll have to do something like this:

btnShow.onclick = (function(opt) {
    return function() {
       showParam(opt);
    };
})(arrOptions[i]);

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