window.addEvent('domready', function(){
    var tableelements = $('main').getElements('table');
    
    tableelements.each(function(table){
        var even = false;
        
        table.getElements('tr').each(function(e){									
            if (even) {
                classname = 'evenTr';
                even = false;
            }
            else {
                classname = 'oddTr';
                even = true;
            }
            
            e.addClass(classname);
            
            if (e.hasClass('nohover')) 
                return;
            
            e.addEvent('mouseenter', function(){
                e.addClass('hoverTr');
            });
            
            e.addEvent('mouseleave', function(){
                e.removeClass('hoverTr');
            });
        });
    });
});