function init_menu() {
	if (!document.getElementsByTagName) { return; }
    // 2 knoppen
    if(document.getElementById('toggle_webshop')) {
        var sub_but_1 = document.getElementById('toggle_webshop');
        var sub_menu_1 = document.getElementById('weltevree_webshop');
        sub_but_1.onclick=function() {
            if(sub_menu_1.style.display=='block') {
                sub_menu_1.style.display='none';
            } else {
                sub_menu_1.style.display='block';
            }
        }    
    }
    if(document.getElementById('toggle_contact')) {
        var sub_but_2 = document.getElementById('toggle_contact');
        var sub_menu_2 = document.getElementById('weltevree_contact');
        sub_but_2.onclick=function() {
            if(sub_menu_2.style.display=='block') {
                sub_menu_2.style.display='none';
            } else {
                sub_menu_2.style.display='block';
            }
        }    
    }
}
window.onload = function () { init_menu(); }