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<html><title>Sort a HTML List Alphabetically</title><body><p>Click the button to sort the list ascending (A to Z):</p><p>Click again to sort the list descending (Z to A):</p><button onclick="sortListDir()">Sort</button><ul id="id01"> <li>Oslo</li> <li>Stockholm</li> <li>Helsinki</li> <li>Berlin</li> <li>Rome</li> <li>Madrid</li></ul><script>function sortListDir() { var list, i, switching, b, shouldSwitch, dir, switchcount = 0; list = document.getElementById("id01"); switching = true; // Set the sorting direction to ascending: dir = "asc"; // Make a loop that will continue until no switching has been done: while (switching) { // start by saying: no switching is done: switching = false; b = list.getElementsByTagName("LI"); // Loop through all list-items: for (i = 0; i < (b.length - 1); i++) { //start by saying there should be no switching: shouldSwitch = false; /* check if the next item should switch place with the current item, based on the sorting direction (asc or desc): */ if (dir == "asc") { if (b[i].innerHTML.toLowerCase() > b[i + 1].innerHTML.toLowerCase()) { /* if next item is alphabetically lower than current item, mark as a switch and break the loop: */ shouldSwitch = true; break; } } else if (dir == "desc") { if (b[i].innerHTML.toLowerCase() < b[i + 1].innerHTML.toLowerCase()) { /* if next item is alphabetically higher than current item,