function make_table_classes()
{
        var tables = document.getElementById('fullPage').getElementsByTagName('table');

        for (var i=0; i<tables.length; i++)
        {
                var tabel = tables[i];

                var trs = tabel.getElementsByTagName('tr');
                var b="0";
                for (var a=0; a<trs.length; a++)
                {
                        var tr = trs[a];
                        var vorig = b;
                        if(b == "2")
                        {
                                trs[a].className = "tableRowLight";
                                b="1";
                        }
                        if(b == "1" && vorig != "2")
                        {
                                trs[a].className = "tableRowDark";
                                b="2";
                        }

                        if(a == "0")
                        {
                                trs[a].className = "tableRowLight"; //tableHeader
                                b="1";
                        }

                }
        }
}