function change_sex(sex)
{
if(sex=='men'){sex_on='men';sex_off='woman';
}
else{sex_on='woman';sex_off='men';

document.getElementById('woman').style.display='block';
document.getElementById('men').style.display='none';
}

document.getElementById(sex_on).style.display='block';
document.getElementById(sex_off).style.display='none';

/*i=1;
while(t=document.getElementById(sex_on+i))
{
t.style.display='block';
i++;
}
i=1;
while(t=document.getElementById(sex_off+i))
{
t.style.display='none';
i++;
} */

}