function vis(a) {
var x;
x=a;
if (x<100)
{
massage_box1.style.visibility='hidden';
massage_box2.style.visibility='hidden';
massage_box3.style.visibility='hidden';
massage_box4.style.visibility='hidden';
document.getElementById('massage_box'+a).style.visibility='visible';
}
}
function hidden(a){
{
massage_box1.style.visibility='hidden';
massage_box2.style.visibility='hidden';
massage_box3.style.visibility='hidden';
massage_box4.style.visibility='hidden';
}
}