function ie6Nav() {
    var sections = document.getElementsByTagName("div");
    for (var i = 0; i < sections.length; i++) {
        if (sections[i].className == "navlist")
            sections[i].onclick = showChildren;
    }
}

function showChildren() {
    var sectionDivs = this.getElementsByTagName("ul");

    for (var i = 0; i < sectionDivs.length; i++) {
        if (sectionDivs[i].className == "parentul") {
            if (sectionDivs[i].style.display == "none") {
                hideParentUl();
                sectionDivs[i].style.display = "block";
            }
            else
                sectionDivs[i].style.display = "none";
        }
    }
}
function hideParentUl() {
    var uls = document.getElementsByTagName("ul");
    var lis = document.getElementsByTagName("li");
    for (var i = 0; i < uls.length; i++) {
        if (uls[i].className == "parentul") {
            uls[i].style.display = "none";
        }
    }
}