Co toto:
Kód:
function checkboxOnclick(element) {
    if (!element.checked)
        return;
    var elements = document.getElementsByName("v_plice");
    for &#40;var i = 0; i < elements.length; i++&#41; &#123;
        if &#40;&#40;elements&#91;i&#93; != element&#41; && elements&#91;i&#93;.checked&#41; &#123;
            element.checked = false;
            return;
        &#125;
    &#125;
&#125;
Treba to zavesit na vsetky tie checkboxy cez onclick="checkboxOnclick(this)". Da sa to aj zoptimalizovat, ale kto by sa s tym piplal...