1 window.onload = function () {

     2     var log = document.getElementById("log");

     3     var rows = log.getElementsByTagName("tr");

     4     var rownum = rows.length;

     5     for (var i = 0; i < rownum; i++) {

     6         var row = rows[i];

     7         if (row.getAttribute("class") == "message") {

     8             var nicktd = row.getElementsByClassName("nick")[0];

     9             if (nicktd) {

    10                 var nick = nicktd.textContent;

    11                 var sum = 0;

    12                 for( var j = 0, iTop = nick.length; j < iTop; j++ ) {

    13                     sum += 0x56 ^ nick.charCodeAt(j);

    14                 }

    15                 nicktd.setAttribute("class","nick nick"+(sum % 10));

    16             }

    17         }

    18     }

    19 };