Ul li current list notify

Ul li current list notify
--------------------------------
<ul>
    <li onclick="chgProductSize()"><span style="background-color: rgb(0, 120, 255); width: 6px; height: 6px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></li>
    <li onclick="chgProductSize()"><span style="background-color: rgb(255, 0, 120); width: 6px; height: 6px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></li>
    <li onclick="chgProductSize()"><span style="background-color: rgb(255, 0, 0); width: 6px; height: 6px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></li>
    <li onclick="chgProductSize()" class="mpd_selct"><span style="background-color: rgb(255, 255, 255); width: 6px; height: 6px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></li>
    <li onclick="chgProductSize()" class="border0"><span style="background-color: rgb(0, 209, 5); width: 6px; height: 6px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></li>
</ul>

js
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function chgProductSize()
{
    $('ul li').click( function(){
        $('.mpd_selct').removeClass('mpd_selct');
        $(this).addClass('mpd_selct');
        return false;    }
}