function header_home_menu_show() {
    document.getElementById("header_nav_home_menu").style.display='block';

}

function header_pricing_menu_show() {
    document.getElementById("header_nav_pricing_menu").style.display='block';

}

function header_help_menu_show() {
    document.getElementById("header_nav_help_menu").style.display='block';

}

function header_home_menu_hide() {
    document.getElementById("header_nav_home_menu").style.display='none';

}

function header_pricing_menu_hide() {
    document.getElementById("header_nav_pricing_menu").style.display='none';

}

function header_help_menu_hide() {
    document.getElementById("header_nav_help_menu").style.display='none';

}