function navigate(section) {
	document.main_form.navigation.value = section;
	document.main_form.submit();
}

function changeLanguage(language) {
	document.main_form.languageSwitch.value = language;
	document.main_form.submit();
}

function show_text(text_id) {
	document.main_form.navigation.value = 'text';
	document.main_form.show_text_id.value = text_id;
	document.main_form.submit();
}

function scrollPages(section, start) {
	document.main_form.navigation.value = section;
	document.main_form.start.value = start;
	document.main_form.submit();
}

function select_product(product_group) {
	document.main_form.navigation.value = 'products';
	document.main_form.product_group_id.value = product_group;
	document.main_form.submit();
}

function show_clients(client_type) {
	document.main_form.navigation.value = 'clients';
	document.main_form.client_type.value = client_type;
	document.main_form.submit();
}

function show_contact(contact_type) {
	document.main_form.navigation.value = 'contact';
	document.main_form.contact_type.value = contact_type;
	document.main_form.submit();
}

function select_gallery(gallery) {
	document.main_form.navigation.value = 'gallery';
	document.main_form.gallery_id.value = gallery;
	document.main_form.submit();
}

function changeStyle(style) {
	document.main_form.styleSwitch.value = style;
	document.main_form.submit();
}