function tableruler() {
    if (document.getElementById && document.createTextNode) {
        var tables = document.getElementsByTagName('table');
        for (var i = 0; i < tables.length; i++) {
            if (tables[i].className == 'ruler') {
                var trs = tables[i].getElementsByTagName('tr');
                for (var j = 0; j < trs.length; j++) {
                    if (trs[j].parentNode.nodeName == 'TBODY' && trs[j].parentNode.nodeName != 'TFOOT') {
                        trs[j].onmouseover = function () { this.className = 'ruled'; return false }
                        trs[j].onmouseout = function () { this.className = ''; return false }
                    }
                }
            }
        }
    }
}