(function($) {
    
    function seo(){
        function position(){
            var heightBlock = $('#seo_block').height();
            var marginTop = Math.ceil(heightBlock/2);
            $('#seo_block').css({'margin-top': -marginTop+'px'});
        }
        
        function resize(){
            var wh = $(window).height();
            if(wh < $('#seo_block').height()){         
                $('#seo_block').height(wh);
                var vih = $('#seo_block').innerHeight(); 
                $('#seo_block .red_popup .text').height(vih - 65);
            }    
        }
        
        function fadeToggle(){
            $('#overlay, #seo_block').fadeToggle('slow');
            resize()
            position();
            $('#seo_block .text').qvivoScroll();
        }
        
        $('#footer .f_seo span, #overlay, #seo_block .close a').click(function(){  
            fadeToggle();    
        });
        
    }
    
    $(document).ready(function(){
        seo();
    });
    
})(jQuery);