luci/modules/luci-base/luasrc/view/cbi/button.htm

<%+cbi/valueheader%>
	<% if self:cfgvalue(section) ~= false then %>
		<input class="cbi-button cbi-input-<%=self.inputstyle or "button" %>" type="submit"<%= attr("name", cbid) .. attr("id", cbid) .. attr("value", self.inputtitle or self.title)%> />
	<% else %>
		-
	<% end %>
<%+cbi/valuefooter%>