// this function is needed to work around 
  // a bug in IE related to element attributes
  /*function hasClass(obj) {
     var result = false;
     if (obj.getAttributeNode("class") != null) {
         result = obj.getAttributeNode("class").value;
     }
     return result;
  }   */

 function zebraStripeTables() {

     if (document.getElementById && document.getElementsByTagName) {
         // the flag we'll use to keep track of 
         // whether the current row is odd or even
         var even = false;

         // if arguments are provided to specify the colors
         // of the even & odd rows, then use the them;
         // otherwise use the following defaults:
         var evenColor = "#dbe4f2";
         var oddColor = "#c7d3e4";

         // obtain all tables
         // if no such table exists, abort
         var tables = document.getElementsByTagName("table");
         //if (!table) { return; }

         // and iterate through them...
         for (var g = 0; g < tables.length; g++) {

             // by definition, tables can have more than one tbody
             // element, so we'll have to get the list of child
             // &lt;tbody&gt;s 
             var tbodies = tables[g].getElementsByTagName("tbody");

             // and iterate through them...
             for (var h = 0; h < tbodies.length; h++) {

                 // find all the &lt;tr&gt; elements... 
                 var trs = tbodies[h].getElementsByTagName("tr");

                 // ... and iterate through them
                 for (var i = 0; i < trs.length; i++) {

                     // avoid rows that have a class attribute
                     // or backgroundColor style
                     if (/*!hasClass(trs[i]) &&*/!trs[i].style.backgroundColor) {

                         // get all the cells in this row...
                         var tds = trs[i].getElementsByTagName("td");

                         // and iterate through them...
                         for (var j = 0; j < tds.length; j++) {

                             var mytd = tds[j];

                             // avoid cells that have a class attribute
                             // or backgroundColor style
                             if (/*!hasClass(mytd) &&*/!mytd.style.backgroundColor) {

                                 mytd.style.backgroundColor = even ? evenColor : oddColor;
                                 mytd.style.border = "none";

                             }
                         }
                     }
                     // flip from odd to even, or vice-versa
                     even = !even;
                 }
             }
         }
     }
}

function addLoadEvent(func)
{
    var oldonload = window.onload;
    if (typeof window.onload != 'function')
    {
        window.onload = func;
    }
    else
    {
        window.onload = function ()
        {
            if (oldonload)
            {
                oldonload();
            }
            func();
        }
    }
}

//addLoadEvent(hasClass);
addLoadEvent(zebraStripeTables);