$(document).ready(function(){
    
    var mtbbox = $('#mtbbox'),
        mtb = $('#mtb');


    var vis = false;
    if (mtb.length){
    $.timer(1500, function (timer) {
    	if (!vis) {
            $('#mtb').animate({'opacity':'1'}, 500, "swing");
            vis = true;
    	}
    	else {
    		$('#mtb').animate({'opacity':'0'}, 500, "swing");
    		vis = false;
    	}
    });
    } 
    
    
});