Basic list of example code you can copy & paste…

var myElement = document.getElementById("elementId");

var listItems = document.getElementsByTagName("li");

for (var i = 0, ii = listItems.length; i < ii; i++) {
    alert(listItems[i].nodeName);
}

var lists = document.getElementsByTagName("ul");
var secondList = lists[1];
var secondListItems = secondList.getElementsByTagName("li");

<script src="stripy_tables.js" type="text/javascript"></script>