var is_ie6  =  !!(document.all && navigator.appVersion.indexOf("MSIE 6.")!=-1);
function toggleElement(o) {
    o.style.display = o.style.display != "block" ? "block" : "none";
}
function toggleElementById(elem){
    $('#' + elem).toggle();
}

function opensubmeniu(o) {
    if (is_ie6) $("select.rentacar-ie6").css("visibility","hidden");
    o.getElementsByTagName('ul')[0].style.display = "block";
}
function closesubmeniu(o) {
    if (is_ie6) $("select.rentacar-ie6").css("visibility","visible");
    o.getElementsByTagName('ul')[0].style.display = "none";
}