function showNav() {
    var bodyid = document.body.id;
    var section = "";
    
    if (bodyid.search(/about/i) == 0) {
        section = "about_nav";
    }
    if (bodyid.search(/invest/i) == 0) {
        section = "invest_nav";
    }
    if (bodyid.search(/prop/i) == 0) {
        section = "prop_nav";
    }
    if (bodyid.search(/sus/i) == 0) {
        section = "sus_nav";
    }
    if (bodyid.search(/mgmt/i) == 0) {
        section = "mgmt_nav";
    }
    if (bodyid.search(/press/i) == 0) {
        section = "press_nav";
    }
    if (section != "") {
    document.getElementById(section).style.visibility = "visible";
    document.getElementById(section).style.display = "inline";
    }
}