DouKaku?

var counter=0;
var today = new Date();
for(var y=2008;y<2014;y++){
    for(var m=0;m<12;m++){
        var d13= new Date(y,m,13);
        if(d13 < today) continue;
        if(d13.getDay()==5){
            print(d13);
            counter++;
        }
    }
}
print(counter)