function menuselect(sec_num){

    switch(sec_num) {
        case "1":
            document.getElementById("mainnav_about").className = "highlight_menu";
            break;

        case "2":
            document.getElementById("mainnav_visit").className = "highlight_menu";
            break;

        case "3":
            document.getElementById("mainnav_learnmore").className = "highlight_menu";
            break;

        case "4":
            document.getElementById("mainnav_help").className = "highlight_menu";
            break;

        case "5":
            document.getElementById("mainnav_churches").className = "highlight_menu";
            break;
        
        default:
        break;
    }

}