create li a javascript

create-li-a.js

function add_li_link(label,url,ul_class){
	var ul = document.getElementsByClassName(ul_class)[0];
	var ul = ul.getElementsByTagName("ul")[0];
	var li = document.createElement("li");
	var a = document.createElement("a");
	a.href = url;
	a.appendChild(document.createTextNode(label));
	li.appendChild(a);
	ul.appendChild(li);
}
add_li_link('Nossas Fazendas','nossas-fazendas.php','sub');
add_li_link('Tecnologia e Pesquisa','tecnologia-e-pesquisa.php','sub');