var maildivider="[at]"

for (i=0; i<=(document.links.length-1); i++)
{
    if (document.links[i].href.indexOf(maildivider)!=-1)
    document.links[i].href=document.links[i].href.split(maildivider)[0]+"@"+document.links[i].href.split(maildivider)[1]
}

function disableOH(aa){
    aa.form.mon_open.disabled = aa.checked;
    aa.form.mon_close.disabled = aa.checked;
    aa.form.tue_open.disabled = aa.checked;
    aa.form.tue_close.disabled = aa.checked;
    aa.form.wed_open.disabled = aa.checked;
    aa.form.wed_close.disabled = aa.checked;
    aa.form.thu_open.disabled = aa.checked;
    aa.form.thu_close.disabled = aa.checked;
    aa.form.fri_open.disabled = aa.checked;
    aa.form.fri_close.disabled = aa.checked;
    aa.form.sat_open.disabled = aa.checked;
    aa.form.sat_close.disabled = aa.checked;
    aa.form.sun_open.disabled = aa.checked;
    aa.form.sun_close.disabled = aa.checked;
    aa.form.mon_closed.disabled = aa.checked;
    aa.form.tue_closed.disabled = aa.checked;
    aa.form.wed_closed.disabled = aa.checked;
    aa.form.thu_closed.disabled = aa.checked;
    aa.form.fri_closed.disabled = aa.checked;
    aa.form.sat_closed.disabled = aa.checked;
    aa.form.sun_closed.disabled = aa.checked;
}

function toggle_visibility(id,chk) {
   var e = document.getElementById(id);
   if(chk.checked)
      e.style.display = 'block';
   else
      e.style.display = 'none';
}