var text = document.createTextNode("text 1");
var li = document.getElementById("li-" + i);
var span = document.getElementById("sn-" + i);
li.insertBefore(text, span);
span.innerHTML = "text 2";
var text = document.createTextNode("text 1");
var li = document.getElementById("li-" + i);
var span = document.getElementById("sn-" + i);
li.insertBefore(text, span);
span.innerHTML = "text 2";