<script type="text/javascript"> contentsToggle = function() { var b = document.getElementById("toggle-button") var i = document.getElementById("index-order"); var t = document.getElementById("turn-order"); if (t.style.display == "none") { i.style.display = "none" t.style.display = "block" b.innerText = "Switch to index order" } else { i.style.display = "block" t.style.display = "none" b.innerText = "Switch to turn order" } } window.onload = function(){ if (location.search.search("byturn") > 0) contentsToggle(); } </script> <button id="toggle-button" onClick="javascript:contentsToggle()">Switch to turn order</button>